KENNEDY SPACE CENTER VISITOR COMPLEX, FL – Sending humans on a ‘Journey to Mars’ and developing strategies and hardware to accomplish the daunting task of getting ‘Humans to Mars’ is NASA’s agency wide goal and the goal of many space enthusiasts – including Apollo 11 moonwalker Buzz Aldrin.
NASA is going full speed ahead developing the SLS Heavy lift rocket and Orion crew module with a maiden uncrewed launch from the Kennedy Space Center set for late 2018 to the Moon. Crewed Mars missions would follow by the 2030s.
In the marketplace of ideas, there are other competing and corollary proposals as well from government, companies and private citizens on pathways to the Red Planet. For example SpaceX CEO Elon Musk wants to establish a colony on Mars using an Interplanetary Transport System of SpaceX developed rockets and spaceships.
Moonwalker Aldrin strongly advocated for more commercial activity in space and that “exposure to microgravity” for “many commercial products” is good, he told Universe Today.
More commercial activities in space would aid space commerce and getting humans to Mars.
“We need to do that,” Aldrin told me.
Buzz Aldrin is the second man to set foot on the Moon. He stepped onto the lunar soil a few minutes after Apollo 11 Commander Neil Armstrong, on July 20, 1969 in the Sea of Tranquility.
Aldrin also strongly supports some type of American space station capability “beyond the ISS” to foster the Mars capability.
And we need to be thinking about that follow on “US capability” right now!
“I think we need to have a US capability beyond the ISS to prepare for future activities right from the beginning,” Aldrin elaborated.
Currently the ISS partnership of the US, Russia, ESA, Japan and Canada has approved extending the operations of the International Space Station (ISS) until 2024. What comes after that is truly not known.
NASA is not planning for a follow-on space station in low Earth orbit at this time. The agency seems to prefer development of a commercial space station, perhaps with core modules from Bigelow Aerospace and/or other companies.
So that commercial space station will have to be designed, developed and launched by private companies. NASA and others would then lease space for research and other commercial activities and assorted endeavors on the commercial space station.
For example, Bigelow wants to dock their privately developed B330 habitable module at the ISS by 2020, following launch on a ULA Atlas V. And then spin it off as an independent space station when the ISS program ends – see my story.
Only China has firm plans for a national space station in the 2020’s. And the Chinese government has invited other nations to submit proposals. Russia’s ever changing space exploration plans may include a space station – but that remains to be actually funded and seen.
Regarding Mars, Aldrin has lectured widely and written books about his concept for “cycling pathways to occupy Mars,” he explained.
Watch this video of Apollo 11 moonwalker Buzz Aldrin speaking to Universe Today:
Video Caption: Buzz Aldrin at ‘Destination Mars’ Grand Opening at KSCVC. Apollo 11 moonwalker Buzz Aldrin talks to Universe Today/Ken Kremer during Q&A at ‘Destination Mars’ Holographic Exhibit Grand Opening ceremony at Kennedy Space Center Visitor Complex (KSCVC) in Florida on 9/18/16. Credit: Ken Kremer/kenkremer.com
Here is a transcript:
Universe Today/Ken Kremer: Can you talk about the role of commercial space [in getting humans to Mars]. Elon Musk wants to try and send people to Mars, maybe even before NASA. What do you think?
Buzz Aldrin: “Well, being a transportation guy in space for humans – well commercial, what that brings to mind is tourism plus space travel.
And there are many many more things commercial that are done with products that can be fine tuned by exposure to microgravity. And we need to do that.”
“I think we need to have a US capability beyond the ISS to prepare for future activities right from the beginning.”
“And that’s why what has sort of fallen into place is the name for my plan for the future – which is ‘cycling pathways to occupy Mars.’”
“A cycler in low Earth orbit, one in lunar orbit, and one to take people to Mars.”
“And they are utilized in evolutionary fashion.”
Meanwhile, be sure to visit the absolutely spectacular “Destination Mars” holographic exhibit before it closes on New Year’s Day 2017 – because it is only showing at KSCVC.
You can get more information or book a visit to Kennedy Space Center Visitor Complex, by clicking on the website link:
A bag that travelled to the Moon and back is at the heart of a legal dispute involving NASA and a woman named Nancy Carlson. Carlson currently owns the bag and obtained it legally. But NASA is in possession of the bag, and the US Attorney’s Office wants the courts to quash Carlson’s purchase of the bag, so they can retain ownership of this important piece of space memorabilia.
The story of the Apollo 11 bag is bit of a tangled web. To understand it, we have to look at a third figure, Max Ary. Ary was the founder and long-time director of the Kansas Cosmosphere and Space Center. In 2005, Ary was convicted for stealing and selling museum artifacts.
Hundreds of space artifacts and memorabilia, some on loan from NASA, had gone missing. In 2003, the Apollo 11 bag was found in a box in Ary’s garage during the execution of a search warrant as part of the case against him. However, the bag was misidentified due to a spreadsheet error, and sold to Carlson at a government auction for $995.
NASA only found out about the Apollo 11 bag after Carlson purchased it. Carlson sent it to the Johnson Space Center in Houston to be authenticated. Once NASA realized what the bag was, they set the legal process in motion to set aside the forfeiture and sale. The US Attorney’s office argued that NASA was not properly notified of the bag’s forfeiture because it was not labelled properly.
NASA’s attorney’s wrote “NASA was denied the opportunity to assert its interest in the lunar bag. Had NASA been given notice of the forfeiture action and/or had all the facts about the lunar bag been known, the lunar [sample return] bag would never have gone to a government auction.”
The attorneys added that “The true identity and ownership of the lunar bag are now known. The failure to give proper notice to NASA can be corrected by setting aside the forfeiture and rescinding its sale,” they stated. “These are unusual circumstances that warrant the particular relief sought.”
If this seems like quite a bit of fuss over a bag, remember that this bag travelled to the Moon and back, making it very rare. Apollo 11 astronauts used it to collect the first samples from the Moon, and dust fragments from the Moon are embedded in its fabric. It’s a very valuable historic and scientific artifact. The government said in a statement that the bag is “a rare artifact, if not a national treasure.”
Carlson, who obtained the bag legally at an auction, is an attorney and is now suing NASA for “unwarranted seizure of my personal property… without any legal provocation.” This after she voluntarily submitted the bag to NASA for authentication, and after NASA offered to reimburse her purchase price and an additional $1,000 dollars “in appreciation for your assistance in returning the bag” and “to offset any inconvenience you may have suffered.”
There’s no question that artifacts like these belong in NASA’s public collection, and on display in a museum. But Carlson obtained the bag through a legal auction. Maybe, as the bag’s purchaser, Carlson is hoping that NASA will tender a larger offer for return of the bag, and she can make some profit. That’s pure speculation of course. Perhaps she’s just very keen on owning this piece of history.
As for Max Ary, the man who set all this in motion years ago, he is now out of prison and maintains his innocence. Ary collected other space artifacts and memorabilia and sold them from his home, and he claims that it was just a mix up. He was convicted though, and he served just over 2 years of his 3 year prison sentence. He was also ordered to pay $132,000 in restitution.
Looking for a way to commemorate the 47th anniversary of the Apollo 11 mission landing on the Moon? Here are a few different ways look back on this historic event and take advantage of advances in technology or new data.
Below is a video that uses data from the Lunar Reconnaissance Orbiter and its amazing suite of cameras, offering a side-by-side view of Apollo 11’s descent, comparing footage originally shot from the Eagle lunar module’s window with views created from reconstructed LRO imagery. This is a fun way to re-live the landing — 1202 alarms and all — while seeing high definition views of the lunar surface.
The National Air and Space Museum in Washington, DC has a special way to mark the Apollo 11 anniversary. They have posted online high-resolution 3-D scans of the command moduleColumbia, the spacecraft that carried astronauts Neil Armstrong, Buzz Aldrin and Michael Collins to the Moon. This very detailed model allows you to explore the entire spacecraft’s interior, which, if you’ve ever visited the Air & Space museum and seen Columbia in person, you probably know is a tremendous ‘upgrade,’ since you can only see a portion of the interior through couple of small hatches and windows. The Smithsonian is also making the data files of the model available for download so it can be 3-D printed or viewed with virtual-reality goggles. Find all the details here.
Here’s a remastered version of the original mission video as aired in July 1969 depicting the Apollo 11 astronauts conducting several tasks during the moonwalk (EVA) operations on the surface of the moon, which lasted approximately 2.5 hours.
If you’re pressed for time, here’s a quick look at the entire Apollo 11 mission, all in just 100 seconds from Spacecraft Films:
Here’s a very cool detailed look at the Apollo 11 launch in ultra-slow motion, with narration:
“Good capture confirmed after a two day rendezvous,” said Houston Mission Control at NASA’s Johnson Space Center, as Dragon was approximately 30 feet (10 meters) away from the station.
“We’ve captured us a Dragon,” radioed Williams.
“Congratulations to the entire team that put this thing together, launched it, and successfully rendezvoused it to the International Space Station. We look forward to the work that it brings.”
The events unfolded live on a NASA TV webcast for all to follow along.
Furthermore, today’s dramatic Dragon arrival coincides with a renowned day in the annuls of space history. Today coincides with the 40th anniversary of humanity’s first successful touchdown on the surface of Mars by NASA’s Viking 1 lander on July 20, 1976. It paved the way for many future missions.
And Neil Armstrong and Buzz Aldrin were the first humans to land on another celestial body – the Moon – on July 20, 1969 during NASA’s Apollo 11 lunar landing mission.
Williams was working from a robotics work station in the station’s domed cupola. Rubins was Williams backup. She just arrived at the station on July 9 for a minimum 4 month stay, after launching to orbit on a Russian Soyuz on July 6 with two additional crew mates.
Ground controllers then used the robotic arm to maneuver the Dragon cargo spacecraft closer to its berthing port on the Earth facing side of the Harmony module, located at the front of the station.
Some three hours after the successful grappling, Dragon was joined to the station and bolted into place for initial berthing on the Harmony module at 10:03 a.m. EDT as the station flew about 252 statute miles over the California and Oregon border.
Controllers then activated four gangs of four bolts in the common berthing mechanism (CBM) to complete the second stage capture of the latching and berthing of Dragon to the station with a total of 16 bolts to ensure a snug connection, safety and no pressure leaks.
Crew members Williams and Rubins along with Japanese astronaut Takuya Onishi are now working to install power and data cables from the station to Dragon. They plan to open the hatch tomorrow after pressurizing the vestibule in the forward bulkhead between the station and Dragon.
Dragon reached the station after a carefully choreographed orbital chase and series of multiple thruster firings to propel the cargo ship from its preliminary post launch orbit up to the massive million pound science outpost with six resident crew members from the US, Russia and Japan.
Among the 5000 pounds of equipment on board is the first of two identical docking adapters essential for enabling station dockings next year by NASA’s new commercial astronaut taxis. This mission is all about supporting NASA’s ‘Journey to Mars’ by humans in the 2030s.
Liftoff of the SpaceX Falcon 9 rocket in its upgraded, full thrust version and the Dragon CRS-9 resupply ship took place barely 48 hours ago at 12:45 a.m. EDT Monday, July 18, from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida.
Dragon reached its preliminary orbit about 10 minutes after launch and then deployed a pair of solar arrays.
SpaceX also successfully executed a spellbinding ground landing of the Falcon 9 first stage back at Cape Canaveral Air Force Station’s Landing Zone 1, located a few miles south of launch pad 40.
The dramatic ground landing of the 156 foot tall Falcon 9 first stage at LZ -1 took place about 9 minutes after liftoff. It marks only the second time a spent orbit class booster has touched down intact and upright on land.
Among the wealth of over 3900 pounds (1790 kg) of research investigations loaded on board Dragon is an off the shelf instrument designed to perform the first-ever DNA sequencing in space and the first international docking adapter (IDA) that is absolutely essential for docking of the SpaceX and Boeing built human spaceflight taxis that will ferry our astronauts to the International Space Station (ISS) in some 18 months.
Other science experiments on board include OsteoOmics to test if magnetic levitation can accurately simulate microgravity to study different types of bone cells and contribute to treatments for diseases like osteoporosis, a Phase Change Heat Exchanger to test temperature control technology in space, the Heart Cells experiments that will culture heart cells on the station to study how microgravity changes the human heart, new and more efficient three-dimensional solar cells, and new marine vessel tracking hardware known as the Automatic Identification System (AIS) that will aid in locating and identifying commercial ships across the globe.
The ring shaped IDA-2 unit is stowed in the Dragon’s unpressurized truck section. It weighs 1029 lbs (467 kg), measures about 42 inches tall and sports an inside diameter of 63 inches in diameter – so astronauts and cargo can easily float through. The outer diameter measures about 94 inches.
“Outfitted with a host of sensors and systems, the adapter is built so spacecraft systems can automatically perform all the steps of rendezvous and dock with the station without input from the astronauts. Manual backup systems will be in place on the spacecraft to allow the crew to take over steering duties, if needed,” says NASA.
“It’s a passive system which means it doesn’t take any action by the crew to allow docking to happen and I think that’s really the key,” said David Clemen Boeing’s director of Development/Modifications for the space station.
“Spacecraft flying to the station will use the sensors on the IDA to track to and help the spacecraft’s navigation system steer the spacecraft to a safe docking without astronaut involvement.”
CRS-9 counts as the company’s ninth scheduled flight to deliver supplies, science experiments and technology demonstrations to the International Space Station (ISS).
The CRS-9 mission is for the crews of Expeditions 48 and 49 to support dozens of the approximately 250 science and research investigations in progress under NASA’s Commercial Resupply Services (CRS) contract.
Dragon will remain at the station until its scheduled departure on Aug. 29 when it will return critical science research back to Earth via a parachute assisted splashdown in the Pacific Ocean off the California coast.
Watch for Ken’s continuing CRS-9 mission coverage where he reported onsite direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.
Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.
With the ever-increasing affordability of technology, Virtual Reality is making its way into people’s homes. Systems like the Oculus Rift, and Sony’s PlayStation VR when it’s released next Fall, are becoming increasingly common. These systems, and others to come, will allow people to not only watch VR movies and play VR games, but also to explore space from the comfort of their own homes. This won’t be the only intersection of Virtual Reality and space, though.
NASA, as is often the case, has already blazed a trail when it comes to VR and space. They’ve been using VR to train astronauts for quite a while now. They have a whole lab dedicated to it, called the Virtual Reality Lab, located at the Johnson Space Center in Houston, Texas. At this facility, astronauts use VR to prepare them for working aboard the ISS.
NASA has flirted with other VR solutions as well. They used an Oculus Rift and a VR Treadmill combined with Mars footage from the Curiosity rover to create a virtual walk on the surface of Mars.
NASA’s use of VR is the most advanced around, naturally, but it’s not something most of us will ever encounter. For the rest of us, VR is making it’s way into our space-loving lives in other ways.
A company called Immersive Education has created a VR simulation of the Apollo 11 mission. It allows users to re-live the mission. You can look around the inside of the spacecraft, look out the window toward Earth, even watch and listen as astronauts walk on the surface of the Moon. The company promises “Historically accurate spacecraft interiors and exteriors.”
Here, Apollo astronaut Charlie Duke checks out the Apollo 11 VR on Oculus Rift.
Companies DEEP Inc. and Freedom 360 collaborated with the Canadian Space Agency to create a VR film called “The Edge of Space.” They used 360 degree cameras to record the view from a balloon that reached an altitude of 40km above Earth. Check out their video here. To get the real interactive effect, visit their page to download their app and view it.
Then there’s what I call virtual VR. Or you could call it “headsetless” VR, I guess. Though it lacks the immersion of full VR, it’s still cool. It’s a virtual planetarium from Escapist Games Limited, called Star Chart. Star Chart allows users to cruise through the Solar System and the Universe, checking out stars, nebulae, planets and other objects along the way.
This is just the beginning of VR’s entertainment and educational capabilities. With the growing affordability of VR, and the technological advancements to come, there’s going to some great implementations of VR technology for we space enthusiasts. I expect that in the next few years, we wannabe space explorers will be able to explore the surface of other worlds with VR, right in our own living rooms.
The Universe is a very big place, and we occupy a very small corner of it. Known as the Solar System, our stomping grounds are not only a tiny fraction of the Universe as we know it, but is also a very small part of our galactic neighborhood (aka. the Milky Way Galaxy). When it comes right down to it, our world is just a drop of water in an endless cosmic sea.
Nevertheless, the Solar System is still a very big place, and one which is filled with its fair share of mysteries. And in truth, it was only within the relatively recent past that we began to understand its true extent. And when it comes to exploring it, we’ve really only begun to scratch the surface.
With very few exceptions, few people or civilizations before the era of modern astronomy recognized the Solar System for what it was. In fact, the vast majority of astronomical systems posited that the Earth was a stationary object and that all known celestial objects revolved around it. In addition, they viewed it as being fundamentally different from other stellar objects, which they held to be ethereal or divine in nature.
Although there were some Greek, Arab and Asian astronomers during Antiquity and the Medieval period who believed that the universe was heliocentric in nature (i.e. that the Earth and other bodies revolved around the Sun) it was not until Nicolaus Copernicus developed his mathematically predictive model of a heliocentric system in the 16th century that it began to become widespread.
During the 17th-century, scientists like Galileo Galilei, Johannes Kepler, and Isaac Newton developed an understanding of physics which led to the gradual acceptance that the Earth revolves round the Sun. The development of theories like gravity also led to the realization that the other planets are governed by the same physical laws as Earth.
By the 19th century, three observations made by three separate astronomers determined the true nature of the Solar System and its place the universe. The first was made in 1839 by German astronomer Friedrich Bessel, who successfully measured an apparent shift in the position of a star created by the Earth’s motion around the Sun (aka. stellar parallax). This not only confirmed the heliocentric model beyond a doubt, but revealed the vast distance between the Sun and the stars.
In 1859, Robert Bunsen and Gustav Kirchhoff (a German chemist and physicist) used the newly invented spectroscope to examined the spectral signature of the Sun. They discovered that it was composed of the same elements as existed on Earth, thus proving that Earth and the heavens were composed of the same elements.
Then, Father Angelo Secchi – an Italian astronomer and director at the Pontifical Gregorian University – compared the spectral signature of the Sun with those of other stars, and found them to be virtually identical. This demonstrated conclusively that our Sun was composed of the same materials as every other star in the universe.
Further apparent discrepancies in the orbits of the outer planets led American astronomer Percival Lowell to conclude that yet another planet, which he referred to as “Planet X“, must lie beyond Neptune. After his death, his Lowell Observatory conducted a search that ultimately led to Clyde Tombaugh’s discovery of Pluto in 1930.
Also in 1992, astronomers David C. Jewitt of the University of Hawaii and Jane Luu of the MIT discovered the Trans-Neptunian Object (TNO) known as (15760) 1992 QB1. This would prove to be the first of a new population, known as the Kuiper Belt, which had already been predicted by astronomers to exist at the edge of the Solar System.
Further investigation of the Kuiper Belt by the turn of the century would lead to additional discoveries. The discovery of Eris and other “plutoids” by Mike Brown, Chad Trujillo, David Rabinowitz and other astronomers would lead to the Great Planet Debate – where IAU policy and the convention for designating planets would be contested.
The Sun contains 99.86% of the system’s known mass, and its gravity dominates the entire system. Most large objects in orbit around the Sun lie near the plane of Earth’s orbit (the ecliptic) and most planets and bodies rotate around it in the same direction (counter-clockwise when viewed from above Earth’s north pole). The planets are very close to the ecliptic, whereas comets and Kuiper belt objects are frequently at greater angles to it.
It’s four largest orbiting bodies (the gas giants) account for 99% of the remaining mass, with Jupiter and Saturn together comprising more than 90%. The remaining objects of the Solar System (including the four terrestrial planets, the dwarf planets, moons, asteroids, and comets) together comprise less than 0.002% of the Solar System’s total mass.
Astronomers sometimes informally divide this structure into separate regions. First, there is the Inner Solar System, which includes the four terrestrial planets and the Asteroid Belt. Beyond this, there’s the outer Solar System that includes the four gas giant planets. Meanwhile, there’s the outermost parts of the Solar System are considered a distinct region consisting of the objects beyond Neptune (i.e. Trans-Neptunian Objects).
Most of the planets in the Solar System possess secondary systems of their own, being orbited by planetary objects called natural satellites (or moons). In the case of the four giant planets, there are also planetary rings – thin bands of tiny particles that orbit them in unison. Most of the largest natural satellites are in synchronous rotation, with one face permanently turned toward their parent.
The Sun, which comprises nearly all the matter in the Solar System, is composed of roughly 98% hydrogen and helium. The terrestrial planets of the Inner Solar System are composed primarily of silicate rock, iron and nickel. Beyond the Asteroid Belt, planets are composed mainly of gases (such as hydrogen, helium) and ices – like water, methane, ammonia, hydrogen sulfide and carbon dioxide.
Objects farther from the Sun are composed largely of materials with lower melting points. Icy substances comprise the majority of the satellites of the giant planets, as well as most of Uranus and Neptune (hence why they are sometimes referred to as “ice giants”) and the numerous small objects that lie beyond Neptune’s orbit.
Together, gases and ices are referred to as volatiles. The boundary in the Solar System beyond which those volatile substances could condense is known as the frost line, which lies roughly 5 AU from the Sun. Within the Kuiper Belt, objects and planetesimals are composed mainly of these materials and rock.
Formation and Evolution:
The Solar System formed 4.568 billion years ago from the gravitational collapse of a region within a large molecular cloud composed of hydrogen, helium, and small amounts of heavier elements fused by previous generations of stars. As the region that would become the Solar System (known as the pre-solar nebula) collapsed, conservation of angular momentum caused it to rotate faster.
The center, where most of the mass collected, became increasingly hotter than the surrounding disc. As the contracting nebula rotated faster, it began to flatten into a protoplanetary disc with a hot, dense protostar at the center. The planets formed by accretion from this disc, in which dust and gas gravitated together and coalesced to form ever larger bodies.
Due to their higher boiling points, only metals and silicates could exist in solid form closer to the Sun, and these would eventually form the terrestrial planets of Mercury, Venus, Earth, and Mars. Because metallic elements only comprised a very small fraction of the solar nebula, the terrestrial planets could not grow very large.
In contrast, the giant planets (Jupiter, Saturn, Uranus, and Neptune) formed beyond the point between the orbits of Mars and Jupiter where material is cool enough for volatile icy compounds to remain solid (i.e. the frost line).
The ices that formed these planets were more plentiful than the metals and silicates that formed the terrestrial inner planets, allowing them to grow massive enough to capture large atmospheres of hydrogen and helium. Leftover debris that never became planets congregated in regions such as the asteroid belt, Kuiper belt, and Oort cloud.
Within 50 million years, the pressure and density of hydrogen in the center of the protostar became great enough for it to begin thermonuclear fusion. The temperature, reaction rate, pressure, and density increased until hydrostatic equilibrium was achieved.
At this point, the Sun became a main-sequence star. Solar wind from the Sun created the heliosphere and swept away the remaining gas and dust from the protoplanetary disc into interstellar space, ending the planetary formation process.
The Solar System will remain roughly as we know it today until the hydrogen in the core of the Sun has been entirely converted to helium. This will occur roughly 5 billion years from now and mark the end of the Sun’s main-sequence life. At this time, the core of the Sun will collapse, and the energy output will be much greater than at present.
The outer layers of the Sun will expand to roughly 260 times its current diameter, and the Sun will become a red giant. The expanding Sun is expected to vaporize Mercury and Venus and render Earth uninhabitable as the habitable zone moves out to the orbit of Mars. Eventually, the core will be hot enough for helium fusion and the Sun will burn helium for a time, after which nuclear reactions in the core will start to dwindle.
At this point, the Sun’s outer layers will move away into space, leaving a white dwarf – an extraordinarily dense object that will have half the original mass of the Sun, but will be the size of Earth. The ejected outer layers will form what is known as a planetary nebula, returning some of the material that formed the Sun to the interstellar medium.
Inner Solar System:
In the inner Solar System, we find the “Inner Planets” – Mercury, Venus, Earth, and Mars – which are so named because they orbit closest to the Sun. In addition to their proximity, these planets have a number of key differences that set them apart from planets elsewhere in the Solar System.
For starters, the inner planets are rocky and terrestrial, composed mostly of silicates and metals, whereas the outer planets are gas giants. The inner planets are also much more closely spaced than their outer Solar System counterparts. In fact, the radius of the entire region is less than the distance between the orbits of Jupiter and Saturn.
Generally, inner planets are smaller and denser than their counterparts, and have few to no moons or rings circling them. The outer planets, meanwhile, often have dozens of satellites and rings composed of particles of ice and rock.
The terrestrial inner planets are composed largely of refractory minerals such as the silicates, which form their crusts and mantles, and metals such as iron and nickel which form their cores. Three of the four inner planets (Venus, Earth and Mars) have atmospheres substantial enough to generate weather. All of them have impact craters and tectonic surface features as well, such as rift valleys and volcanoes.
Of the inner planets, Mercury is the closest to our Sun and the smallest of the terrestrial planets. Its magnetic field is only about 1% that of Earth’s, and it’s very thin atmosphere means that it is hot during the day (up to 430°C) and freezing at night (as low as -187 °C) because the atmosphere can neither keep heat in or out. It has no moons of its own and is comprised mostly of iron and nickel. Mercury is one of the densest planets in the Solar System.
Venus, which is about the same size as Earth, has a thick toxic atmosphere that traps heat, making it the hottest planet in the Solar System. This atmosphere is composed of 96% carbon dioxide, along with nitrogen and a few other gases. Dense clouds within Venus’ atmosphere are composed of sulphuric acid and other corrosive compounds, with very little water. Much of Venus’ surface is marked with volcanoes and deep canyons – the biggest of which is over 6400 km (4,000 mi) long.
Earth is the third inner planet and the one we know best. Of the four terrestrial planets, Earth is the largest, and the only one that currently has liquid water, which is necessary for life as we know it. Earth’s atmosphere protects the planet from dangerous radiation and helps keep valuable sunlight and warmth in, which is also essential for life to survive.
Like the other terrestrial planets, Earth has a rocky surface with mountains and canyons, and a heavy metal core. Earth’s atmosphere contains water vapor, which helps to moderate daily temperatures. Like Mercury, the Earth has an internal magnetic field. And our Moon, the only one we have, is comprised of a mixture of various rocks and minerals.
Mars is the fourth and final inner planet, and is also known as the “Red Planet” due to the oxidization of iron-rich materials that form the planet’s surface. Mars also has some of the most interesting terrain features of any of the terrestrial planets. These include the largest mountain in the Solar System (Olympus Mons) which rises some 21,229 m (69,649 ft) above the surface, and a giant canyon called Valles Marineris – which is 4000 km (2500 mi) long and reaches depths of up to 7 km (4 mi).
Much of Mars’ surface is very old and filled with craters, but there are geologically newer areas of the planet as well. At the Martian poles are polar ice caps that shrink in size during the Martian spring and summer. Mars is less dense than Earth and has a smaller magnetic field, which is indicative of a solid core, rather than a liquid one.
Mars’ thin atmosphere has led some astronomers to believe that the surface water that once existed there might have actually taken liquid form, but has since evaporated into space. The planet has two small moons called Phobos and Deimos.
Outer Solar System:
The outer planets (sometimes called Jovian planets or gas giants) are huge planets swaddled in gas that have rings and plenty of moons. Despite their size, only two of them are visible without telescopes: Jupiter and Saturn. Uranus and Neptune were the first planets discovered since antiquity, and showed astronomers that the solar system was bigger than previously thought.
Jupiter is the largest planet in our Solar System and spins very rapidly (10 Earth hours) relative to its orbit of the sun (12 Earth years). Its thick atmosphere is mostly made up of hydrogen and helium, perhaps surrounding a terrestrial core that is about Earth’s size. The planet has dozens of moons, some faint rings and a Great Red Spot – a raging storm that has happening for the past 400 years at least.
Saturn is best known for its prominent ring system – seven known rings with well-defined divisions and gaps between them. How the rings got there is one subject under investigation. It also has dozens of moons. Its atmosphere is mostly hydrogen and helium, and it also rotates quickly (10.7 Earth hours) relative to its time to circle the Sun (29 Earth years).
Uranus was first discovered by William Herschel in 1781. The planet’s day takes about 17 Earth hours and one orbit around the Sun takes 84 Earth years. Its mass contains water, methane, ammonia, hydrogen and helium surrounding a rocky core. It has dozens of moons and a faint ring system. The only spacecraft to visit this planet was the Voyager 2 spacecraft in 1986.
Neptune is a distant planet that contains water, ammmonia, methane, hydrogen and helium and a possible Earth-sized core. It has more than a dozen moons and six rings. NASA’s Voyager 2 spacecraft also visited this planet and its system by 1989 during its transit of the outer Solar System.
There have been more than a thousand objects discovered in the Kuiper Belt, and it’s theorized that there are as many as 100,000 objects larger than 100 km in diameter. Given to their small size and extreme distance from Earth, the chemical makeup of KBOs is very difficult to determine.
However, spectrographic studies conducted of the region since its discovery have generally indicated that its members are primarily composed of ices: a mixture of light hydrocarbons (such as methane), ammonia, and water ice – a composition they share with comets. Initial studies also confirmed a broad range of colors among KBOs, ranging from neutral grey to deep red.
This suggests that their surfaces are composed of a wide range of compounds, from dirty ices to hydrocarbons. In 1996, Robert H. Brown et al. obtained spectroscopic data on the KBO 1993 SC, revealing its surface composition to be markedly similar to that of Pluto (as well as Neptune’s moon Triton) in that it possessed large amounts of methane ice.
Water ice has been detected in several KBOs, including 1996 TO66, 38628 Huya and 20000 Varuna. In 2004, Mike Brown et al. determined the existence of crystalline water ice and ammonia hydrate on one of the largest known KBOs, 50000 Quaoar. Both of these substances would have been destroyed over the age of the Solar System, suggesting that Quaoar had been recently resurfaced, either by internal tectonic activity or by meteorite impacts.
Keeping Pluto company out in the Kuiper belt are many other objects worthy of mention. Quaoar, Makemake, Haumea, Orcus and Eris are all large icy bodies in the Belt and several of them even have moons of their own. These are all tremendously far away, and yet, very much within reach.
Oort Cloud and Farthest Regions:
The Oort Cloud is thought to extend from between 2,000 and 5,000 AU (0.03 and 0.08 ly) to as far as 50,000 AU (0.79 ly) from the Sun, though some estimates place the outer edge as far as 100,000 and 200,000 AU (1.58 and 3.16 ly). The Cloud is thought to be comprised of two regions – a spherical outer Oort Cloud of 20,000 – 50,000 AU (0.32 – 0.79 ly), and disc-shaped inner Oort (or Hills) Cloud of 2,000 – 20,000 AU (0.03 – 0.32 ly).
The outer Oort cloud may have trillions of objects larger than 1 km (0.62 mi), and billions that measure 20 kilometers (12 mi) in diameter. Its total mass is not known, but – assuming that Halley’s Comet is a typical representation of outer Oort Cloud objects – it has the combined mass of roughly 3×1025 kilograms (6.6×1025 pounds), or five Earths.
Based on the analyses of past comets, the vast majority of Oort Cloud objects are composed of icy volatiles – such as water, methane, ethane, carbon monoxide, hydrogen cyanide, and ammonia. The appearance of asteroids thought to be originating from the Oort Cloud has also prompted theoretical research that suggests that the population consists of 1-2% asteroids.
Earlier estimates placed its mass up to 380 Earth masses, but improved knowledge of the size distribution of long-period comets has led to lower estimates. The mass of the inner Oort Cloud, meanwhile, has yet to be characterized. The contents of both Kuiper Belt and the Oort Cloud are known as Trans-Neptunian Objects (TNOs), because the objects of both regions have orbits that that are further from the Sun than Neptune’s orbit.
Our knowledge of the Solar System also benefited immensely from the advent of robotic spacecraft, satellites, and robotic landers. Beginning in the mid-20th century, in what was known as “The Space Age“, manned and robotic spacecraft began exploring planets, asteroids and comets in the Inner and Outer Solar System.
All planets in the Solar System have now been visited to varying degrees by spacecraft launched from Earth. Through these unmanned missions, humans have been able to get close-up photographs of all the planets. In the case of landers and rovers, tests have been performed on the soils and atmospheres of some.
The first artificial object sent into space was the Soviet satellite Sputnik 1, which was launched in space in 1957, successfully orbited the Earth for months, and collected information on the density of the upper atmosphere and the ionosphere. The American probe Explorer 6, launched in 1959, was the first satellite to capture images of the Earth from space.
Robotic spacecraft conducting flybys also revealed considerable information about the planet’s atmospheres, geological and surface features. The first successful probe to fly by another planet was the Soviet Luna 1 probe, which sped past the Moon in 1959. The Mariner program resulted in multiple successful planetary flybys, consisting of the Mariner 2 mission past Venus in 1962, the Mariner 4 mission past Mars in 1965, and the Mariner 10 mission past Mercury in 1974.
By the 1970’s, probes were being dispatched to the outer planets as well, beginning with the Pioneer 10 mission which flew past Jupiter in 1973 and the Pioneer 11 visit to Saturn in 1979.The Voyager probes performed a grand tour of the outer planets following their launch in 1977, with both probes passing Jupiter in 1979 and Saturn in 1980-1981. Voyager 2 then went on to make close approaches to Uranus in 1986 and Neptune in 1989.
Launched on January 19th, 2006, the New Horizons probe is the first man-made spacecraft to explore the Kuiper Belt. This unmanned mission flew by Pluto in July 2015. Should it prove feasible, the mission will also be extended to observe a number of other Kuiper Belt Objects (KBOs) in the coming years.
Orbiters, rovers, and landers began being deployed to other planets in the Solar System by the 1960’s. The first was the Soviet Luna 10 satellite, which was sent into lunar orbit in 1966. This was followed in 1971 with the deployment of the Mariner 9 space probe, which orbited Mars, and the Soviet Venera 9 which orbited Venus in 1975.
The Galileo probe became the first artificial satellite to orbit an outer planet when it reached Jupiter in 1995, followed by the Cassini–Huygens probe orbiting Saturn in 2004. Mercury and Vesta were explored by 2011 by the MESSENGER and Dawn probes, respectively, with Dawn establishing orbit around the asteroid/dwarf planet Ceres in 2015.
The first probe to land on another Solar System body was the Soviet Luna 2 probe, which impacted the Moon in 1959. Since then, probes have landed on or impacted on the surfaces of Venus in 1966 (Venera 3), Mars in 1971 (Mars 3 and Viking 1 in 1976), the asteroid 433 Eros in 2001 (NEAR Shoemaker), and Saturn’s moon Titan (Huygens) and the comet Tempel 1 (Deep Impact) in 2005.
To date, only two worlds in the Solar System, the Moon and Mars, have been visited by mobile rovers. The first robotic rover to land on another planet was the Soviet Lunokhod 1, which landed on the Moon in 1970. The first to visit another planet was Sojourner, which traveled 500 meters across the surface of Mars in 1997, followed by Spirit(2004), Opportunity (2004), and Curiosity (2012).
Manned missions into space began in earnest in the 1950’s, and was a major focal point for both the United States and Soviet Union during the “Space Race“. For the Soviets, this took the form of the Vostok program, which involved sending manned space capsules into orbit.
The first mission – Vostok 1 – took place on April 12th, 1961, and was piloted by Soviet cosmonaut Yuri Gagarin (the first human being to go into space). On June 6th, 1963, the Soviets also sent the first woman – Valentina Tereshvoka – into space as part of the Vostok 6 mission.
In the US, Project Mercury was initiated with the same goal of placing a crewed capsule into orbit. On May 5th, 1961, astronaut Alan Shepard went into space aboard the Freedom 7mission and became the first American (and second human) to go into space.
After the Vostok and Mercury programs were completed, the focus of both nations and space programs shifted towards the development of two and three-person spacecraft, as well as the development of long-duration spaceflights and extra-vehicular activity (EVA).
This took the form of the Voshkod and Gemini programs in the Soviet Union and US, respectively. For the Soviets, this involved developing a two to three-person capsule, whereas the Gemini program focused on developing the support and expertise needed for an eventual manned mission to the Moon.
These latter efforts culminated on July 21st, 1969 with the Apollo 11 mission, when astronauts Neil Armstrong and Buzz Aldrin became the first men to walk on the Moon. As part of the Apollo program, five more Moon landings would take place through 1972, and the program itself resulted in many scientific packages being deployed on the Lunar surface, and samples of moon rocks being returned to Earth.
After the Moon Landing took place, the focus of the US and Soviet space programs then began to shift to the development of space stations and reusable spacecraft. For the Soviets, this resulted in the first crewed orbital space stations dedicated to scientific research and military reconnaissance – known as the Salyut and Almaz space stations.
The first orbital space station to host more than one crew was NASA’s Skylab, which successfully held three crews from 1973 to 1974. The first true human settlement in space was the Soviet space station Mir, which was continuously occupied for close to ten years, from 1989 to 1999. It was decommissioned in 2001, and its successor, the International Space Station, has maintained a continuous human presence in space since then.
During their history of service, two of the craft were destroyed in accidents. These included the Space Shuttle Challenger – which exploded upon take-off on Jan. 28th, 1986 – and the Space Shuttle Columbia which disintegrated during re-entry on Feb. 1st, 2003.
In 2004, then-U.S. President George W. Bush announced the Vision for Space Exploration, which called for a replacement for the aging Shuttle, a return to the Moon and, ultimately, a manned mission to Mars. These goals have since been maintained by the Obama administration, and now include plans for an Asteroid Redirect mission, where a robotic craft will tow an asteroid closer to Earth so a manned mission can be mounted to it.
All the information gained from manned and robotic missions about the geological phenomena of other planets – such as mountains and craters – as well as their seasonal, meteorological phenomena (i.e. clouds, dust storms and ice caps) have led to the realization that other planets experience much the same phenomena as Earth. In addition, it has also helped scientists to learn much about the history of the Solar System and its formation.
As our exploration of the Inner and Outer Solar System has improved and expanded, our conventions for categorizing planets has also changed. Our current model of the Solar System includes eight planets (four terrestrial, four gas giants), four dwarf planets, and a growing number of Trans-Neptunian Objects that have yet to be designated. It also contains and is surrounded by countless asteroids and planetesimals.
Given its sheer size, composition and complexity, researching our Solar System in full detail would take an entire lifetime. Obviously, no one has that kind of time to dedicate to the topic, so we have decided to compile the many articles we have about it here on Universe Today in one simple page of links for your convenience.
There are thousands of facts about the solar system in the links below. Enjoy your research.
Chances are that if you have lived on this planet for the past half-century, you’ve heard of NASA. As the agency that is in charge of America’s space program, they put a man on the Moon, launched the Hubble Telescope, helped establish the International Space Station, and sent dozens of probes and shuttles into space.
But do you know what the acronym NASA actually stands for? Well, NASA stands for the National Aeronautics and Space Administration. As such, it oversees America’s spaceflight capabilities and conducts valuable research in space. However, NASA also has various programs on Earth dedicated to flight, hence why the term “Aeronautics” appears in the agency’s name.
The process of forming NASA began in the early 1950’s with the development of rocket planes – like the Bell X-1 – and the desire to launch physical satellites. However, it was not until the launch of Sputnik 1 – the first artificial satellite into space that was deployed by the Soviets on October 4th, 1957 – that efforts to develop an American space program truly began.
Fearing that Sputnik represented a threat to national security and America’s technological leadership, Congress urged then-President Dwight D. Eisenhower to take immediate action. This result in an agreement whereby a federal organization similar to the National Advisory Committee for Aeronautics (NACA) – which was established in 1915 to oversee aeronautical research – would be created.
On July 29th, 1958, Eisenhower signed the National Aeronautics and Space Act, which officially established NASA. When it began operations on October 1st, 1958, NASA absorbed NACA and its 8,000 employees. It was also given an annual budget of US $100 million, three major research laboratories (Langley Aeronautical Laboratory, Ames Aeronautical Laboratory, and Lewis Flight Propulsion Laboratory) and two small test facilities.
Elements of the Army Ballistic Missile Agency and the United States Naval Research Laboratory were also incorporated into NASA. A significant contribution came from the work of the Army Ballistic Missie Agency (ABMA), which had been working closely with Wernher von Braun – the leader of Germany’s rocket program during WWII – at the time.
In December 1958, NASA also gained control of the Jet Propulsion Laboratory, a contractor facility operated by the California Institute of Technology. By 1959, President Eisenhower officially approved of A NASA seal, which is affectionately referred to as the “meatball” logo because of the orbs included in the design.
NASA has since been responsible for the majority of the manned and unmanned American missions that have been sent into space. Their efforts began with the development of the X-15, a hypersonic jet plane that NASA had taken over from the NACA. As part of the program, twelve pilots were selected to fly the X-15, and achieve new records for both speed and maximum altitude reached.
A total of 199 flights were made between 1959 and 1968, resulting in two official world records being made. The first was for the highest speed ever reached by a manned craft – Mach 6.72 or 7,273 km/h (4,519 mph) – while the second was for the highest altitude ever achieved, at 107.96 km (354,200 feet).
The X-15 program also employed mechanical techniques used in the later manned spaceflight programs, including reaction control system jets, space suits, horizon definition for navigation, and crucial reentry and landing data. However, by the early 60’s, NASA’s primary concern was winning the newly-declared “Space Race” with the Soviets by putting a man into orbit.
This began with the Project Mercury, a program that was taken over from the US Air Force and which ran from 1959 until 1963. Designed to send a man into space using existing rockets, the program quickly adopted the concept launching a ballistic capsules into orbit. The first seven astronauts, nicknamed the “Mercury Seven“, were selected from from the Navy, Air Force and Marine test pilot programs.
On May 5th, 1961, astronaut Alan Shepard became the first American in space aboard the Freedom 7 mission. John Glenn became the first American to be launched into orbit by an Atlas launch vehicle on February 20th, 1962, as part of Friendship 7. Glenn completed three orbits, and three more orbital flights were made, culminating in L. Gordon Cooper’s 22-orbit flight aboard Faith 7, which flew on May 15th and 16th, 1963.
Project Gemini: Project Gemini, which began in 1961 and ran until 1966, aimed at developing support for Project Apollo (which also began in 1961). This involved the development of long-duration space missions, extravehicular activity (EVA), rendezvous and docking procedures, and precision Earth landing. By 1962, the program got moving with the development of a series of two-man spacecraft.
The first flight, Gemini 3, went up on March 23rd, 1965 and was flown by Gus Grissom and John Young. Nine missions followed in 1965 and 1966, with spaceflights lasting for nearly fourteen days while crews conducting docking and rendezvous operations, EVAs, and gathered medical data on the effects of weightlessness on humans.
And then there was the Project Apollo, which began in 1961 and ran until 1972. Due to the Soviets maintaining a lead in the space race up until this point, President John F. Kennedy asked Congress on May 25th, 1961 to commit the federal government to a program to land a man on the Moon by the end of the 1960s. With a price tag of $20 billion (or an estimated $205 billion in present-day US dollars), it was the most expensive space program in history.
The program relied on the use of Saturn rockets as launch vehicles, and spacecraft that were larger than either the Mercury or Gemini capsules – consisting of a command and service module (CSM) and a lunar landing module (LM). The program got off to a rocky start when, on January 27th, 1967, the Apollo 1 craft experienced an electrical fire during a test run. The fire destroyed the capsule and killed the crew of three, consisting of Virgil I. “Gus” Grissom, Edward H. White II, Roger B. Chaffee.
The second manned mission, Apollo 8, brought astronauts for the first time in a flight around the Moon in December of 1968. On the next two missions, docking maneuvers that were needed for the Moon landing were practiced. And finally, the long-awaited Moon landing was made with theApollo 11mission on July 20th, 1969. Astronauts Neil Armstrong and Buzz Aldrin became the first men to walk on the Moon while pilot Michael Collins observed.
Five subsequent Apollo missions also landed astronauts on the Moon, the last in December 1972. Throughout these six Apollo spaceflights, a total of twelve men walked on the Moon. These missions also returned a wealth of scientific data, not to mention 381.7 kilograms (842 lb) of lunar samples to Earth. The Moon landing marked the end of the space race, but Armstrong declared it a victory for “mankind” rather than just the US.
Skylab and the Space Shuttle Program:
After Project Apollo, NASA’s efforts turned towards the creation of an orbiting space station and the creation of reusable spacecraft. In the case of the former, this took the form of Skylab, America’s first and only independently-built space station. Conceived of in 1965, the station was constructed on Earth and launched on May 14th, 1973 atop the first two stages of a Saturn V rocket.
Skylab was damaged during its launch, losing its thermal protection and one electricity-generating solar panels. This necessitated the first crew to rendezvous with the station to conduct repairs. Two more crews followed, and the station was occupied for a total of 171 days during its history of service. This ended in 1979 with the downing of the station over the Indian Ocean and parts of southern Australia.
By the early 70s, a changing budget environment forced NASA to begin researching reusable spacecraft, which resulted in the Space Shuttle Program. Unlike previous programs, which involved small space capsules being launched on top of multistage rockets, this program centered on the use of vehicles that were launchable and (mostly) reusable.
Its major components were a spaceplane orbiter with an external fuel tank and two solid-fuel launch rockets at its side. The external tank, which was bigger than the spacecraft itself, was the only major component that was not reused. Six orbiters were constructed in total, named Space Shuttle Atlantis, Columbia, Challenger, Discovery, Endeavour and Enterprise.
Over the course of 135 missions, which ran from 1983 to 1998, the Space Shuttles performed many important tasks. These included carrying the Spacelab into orbit – a joint effort with the European Space Agency (ESA) – running supplies to Mir and the ISS (see below), and the launch and successful repair of the Hubble Space Telescope (which took place in 1990 and 1993, respectively).
The Shuttle program suffered two disasters during the course of its 15 years of service. The first was the Challenger disaster in 1986, while the second – the Columbia disaster – took place in 2003. Fourteen astronauts were lost, as well as the two shuttles. By 2011, the program was discontinued, the last mission ending on July 21st, 2011 with the landing of Space Shuttle Atlantis at the Kennedy Space Center.
The ISS and Recent Projects:
With the retirement of the Space Shuttle Program in 2011, crew members were delivered exclusively by Soyuz spacecraft. The Soyuz remains docked with the station while crews perform their six-month long missions, and then returns them to Earth. Until another US manned spacecraft is ready – which is NASA is busy developing – crew members will travel to and from the ISS exclusively aboard the Soyuz.
The ISS has been continuously occupied for the past 15 years, having exceeded the previous record held by Mir; and has been visited by astronauts and cosmonauts from 15 different nations. The ISS program is expected to continue until at least 2020, but may be extended until 2028 or possibly longer, depending on the budget environment.
Future of NASA:
A few years ago, NASA celebrated its fiftieth anniversary. Originally designed to ensure American supremacy in space, it has since adapted to changing conditions and political climates. It’s accomplishments have also been extensive, ranging from launching the first American artificial satellites into space for scientific and communications purposes, to sending probes to explore the planets of the Solar System.
But above all else, NASA’s greatest accomplishments have been in sending human beings into space, and being the agency that conducted the first manned missions to the Moon. In the coming years, NASA hopes to build on that reputation, bringing an asteroid closer to Earth so we can study it more closely, and sending manned missions to Mars.
There have been many astronauts who have made tremendous contributions to our knowledge of space. But asking “who is the most famous?” is somewhat tricky. For one, its a bit subjective. And second, it can be hard to objectively measure just how important and individuals contributions really are. Surely, all astronauts are deserving of recognition and respect for their bravery and contributions to the pursuit of knowledge.
Nevertheless, in the course of human space exploration, some names do stand out more than others. And some have made such immense contributions that their names will live on long after we too have passed away. So without further ado, here are just a few of the most famous astronauts, along with a list of their accomplishments.
As the first man to ever go into space, no list of famous astronauts would be complete without Yuri Gagarin. Born in the village of Klushino in the Smolensk Oblast on March 9th, 1934, Gagarin was drafted into the Soviet Air Force in 1955 and trained in the use of jet fighters. In 1960, he was selected alongside 19 other pilots to join the newly-formed Soviet Space Program.
Gagarin was further selected to become part of the Sochi Six, an elite group of cosmonauts who formed the backbone of the Vostok program. Due to his training, physical size (as the spacecraft were quite cramped), and favor amongst his peers, Gagarin was selected to be the first human cosmonaut (they had already sent dogs) to make the journey.
On April 12th, 1961, Gagarin was launched aboard the Vostok 1 spacecraft from the Baikonur Cosmodrome, and thus became the fist man to go into space. During reentry, Gagarin claimed to have whistled “The Motherland Hears, The Motherland Knows”, and reportedly said, “I don’t see any God up here” when he reached suborbital altitude (which was falsely attributed).
Afterwards, he toured the world and became a celebrity at home, commemorated with stamps, statues, and the renaming of his ancestral village to Gagarin. The 12th of April is also known as “Cosmonauts Day” in Russia and many former Soviet-states in his honor.
Gagarin died during a routine training exercise in March 27th, 1968. The details of his death were not released until June of 2013, when a declassified report indicated that Gagarin’s death was caused by the error of another pilot.
Alan B. Shepard Jr.:
In addition to being an astronaut and one of the Mercury Seven – the first seven pilots selected by NASA to go into space – Shepard was also the first American man to go into space. He was born November 18th, 1923 in Pebble, California and graduated from the United States Naval Academy with a Bachelor of Science degree. While in the Navy, Shepard became a fighter pilot and served aboard several aircraft carriers in the Mediterranean.
In 1959, he was selected as one of 110 military test pilots to join NASA. As 0ne of the seven Mercury astronauts, Shepard was selected to be the first to go up on May 5th, 1961. Known as the Freedom 7mission, this flight placed him into a suborbital flight around Earth. Unfortunately, Alan was beaten into space by Soviet cosmonaut Yuri Gagarin by only a few weeks, and hence became the first American to go into space.
Shepard went on to lead other missions, including the Apollo 14mission – which was the third mission to land on the Moon. While on the lunar surface, he was photographed playing a round of golf and hit two balls across the surface. After leaving NASA, he became a successful businessman. He died of leukemia on July 21st, 1998, five weeks before the death of his wife of 53 years.
Another famous Russian cosmonaut, Tereshkova is also internationally renowned for being the first woman to go into space. Born in the village of Maslennikovo in central Russia on March 6th, 1937, Tereshkova became interested in parachuting from a young age and began training at the local aeroclub.
After Gagarin’s historic flight in 1961, the Soviets hopes to also be the first country to put a woman into space. On 16 February 1962, Valentina Tereshkova was selected to join the female cosmonaut corps, and was selected amongst hundreds to be one of five women who would go into space.
In addition to her expertise in parachuting (which was essential since Vostok pilots were to parachute from the capsule after reentry), her background as a “proletariat”, and the fact that her father was a war hero from the Russo-Finnish War, led to her being selected.
Her mission, Vostok 6, took place on June 16th, 1963. During her flight, Tereshkova orbited Earth forty-eight times, kept a flight log and took photographs that would prove useful to atmospheric studies. Aside from some nausea (which she later claimed was the result of spoiled food!) she maintained herself for the full three days and parachuted down during re-entry, landing a bit hard and bruising her face.
After returning home, Tereshkova went on to become a cosmonaut engineer and spent the rest of her life in key political positions. She married fellow cosmonaut Andrian Nikolayev and had a daughter. After her flight, the women’s corps was dissolved. Vostok 6 was to be the last of the Vostok flights, and it would be nineteen years before another woman would go into space (see Sally Ride, below).
John Glenn Jr.:
Colonel Glenn, USMC (retired) was a Marine Corps fighter pilot and a test pilot before becoming an astronaut. Due to his experience, he was chosen by NASA to be part of the Mercury Seven in 1959. On February 20, 1962, Glenn flew the Friendship 7 mission, and thus became the first American astronaut to orbit the Earth and the fifth person to go into space.
For his contributions to spaceflight, John Glenn earned the Space Congressional Medal of Honor. After an extensive career as an astronaut, Glenn retired from NASA on January 16th, 1964, to enter politics. He won his first bid to become a US Senator in 1974, representing Ohio for the Democratic Party, and was reelected numerous times before retiring in January of 1999.
With the death of Scott Carpenter on October 10, 2013, he became the last surviving member of the Mercury Seven. He was also the only astronaut to fly in both the Mercury and Space Shuttle programs – at age 77, he flew as a Payload Specialist on Discovery mission (STS-95). For his history of service, he was awarded the Presidential Medal of Freedom in 2012.
Neil Armstrong is arguably the most famous astronauts, and indeed one of the most famous people that has ever lived. As commander of the historic Apollo 11 mission, he will forever be remembered as the first man to ever walk on a body other than Earth. Born on August 5th, 1930, in Wapakoneta, Ohio, he graduated from Purdue University and served the National Advisory Committee for Aeronautics High-Speed Flight Station before becoming an astronaut.
In accordance with the Holloway Plan, Neil studied at Purdue for two years and then committed to three years of military service as a naval aviator before completing his degree. During this time, he trained in the use of jet aircraft and became a test pilot at Andrews Air Force base, meeting such personalities as Chuck Yeager.
In 1962, when NASA was looking to create a second group of astronauts (after the Mercury 7), Armstrong joined and became part of the Gemini program. He flew two missions, as the command pilot and back-up command pilot for Gemini 8 and Gemini 11 (both in 1966), before being offered a spot with the Apollo program.
On July 16th, 1969, Armstrong went into space aboard the Apollo 11 spacecraft, alongside “Buzz” Aldrin and Michael Collins. On the 20th, after the lunar module set down on the surface, he became the first person to walk on the Moon. As he stepped onto the lunar surface, Armstrong uttered the famous words, “That’s one small step for a man, one giant leap for mankind.”
After retiring from NASA in 1971, Armstrong completed his master’s degree in aerospace engineering, became a professor at the University of Cincinnati, and a private businessman.
On Augusts 25th, 2012, he died at the age of 82 after suffering complications from coronary artery bypass surgery. On September 14th, his cremated remains were scattered in the Atlantic Ocean during a burial-at-sea ceremony aboard the USS Philippine Sea.
For his accomplishments, Armstrong was awarded the Presidential Medal of Freedom, the Congressional Space Medal of Honor, and the Congressional Gold Medal in 2009.
James Lovell Jr.:
Lovell was born on March 25th, 1928 in Cleveland, Ohio. Like Shepard, he graduated from the US Naval Academy and served as a pilot before becoming one of the Mercury Seven. Over the course of his career, he flew several missions into space and served in multiple roles. The first was as the pilot of the Apollo 8 command module, which was the first spacecraft to enter lunar orbit.
He also served as backup commander during the Gemini 12 mission, which included a rendezvous with another manned spacecraft. However, he is most famous for his role as commander the Apollo 13 mission, which suffered a critical failure en route to the Moon but was brought back safely due to the efforts of her crew and the ground control team.
Lovell is a recipient of the Congressional Space Medal of Honor and the Presidential Medal of Freedom. He is one of only 24 people to have flown to the Moon, the first of only three people to fly to the Moon twice, and the only one to have flown there twice without making a landing. Lovell was also the first person to fly in space four times.
Dr. Sally Ride:
Sally Ride became renowned in the 1980s for being one of the first women to go into space. Though Russians had already sent up two female astronauts – Valentina Tereshkova (1963) and Svetlana Savitskaya (1982) – Ride was the first American female astronaut to make the journey. Born on May 26th, 1951, in La Jolla, California, Ride received her doctorate from Stanford University before joining NASA in 1978.
On June 18th, 1983, she became the first American female astronaut to go into space as part of the STS-7 mission that flew aboard the space shuttle Challenger. While in orbit, the five-person crew deployed two communications satellites and Ride became the first woman to use the robot arm (aka. Canadarm).
Her second space flight was in 1984, also on board the Challenger. In 1986, Ride was named to the Rogers Commission, which was charged with investigating the space shuttle Challenger disaster. In 2003, she would serve on the committee investigating the space shuttle Columbia disaster, and was the only person to serve on both.
Ride retired from NASA in 1987 as a professor of physics and continued to teach until her death in 2012 from pancreatic cancer. For her service, she was given numerous awards, which included the National Space Society’s von Braun Award, two NASA Space Flight Medals, and was inducted into the National Women’s Hall of Fame and the Astronaut Hall of Fame.
Last, but certainly not least, there’s Chris Hadfield, the Canadian astronaut, pilot and engineer who became famous for his rendition of “Space Oddity” while serving as the commander of the International Space Station. Born on August 29th, 1959 in Sarnia, Ontario, Hadfield became interesting in flying at a young age and in becoming an astronaut when he watched the televised Apollo 11 landing at age nine.
After graduating from high school, Hadfield joined the Canadian Armed Forces and spent two years at Royal Roads Military College followed by two years at the Royal Military College, where he received a bachelor’s degree in mechanical engineering in 1982. He then became a fighter pilot with the Royal Canadian Air Force, flying missions for NORAD. He also flew as a test pilot out of Andrews Air Force Base as part of an officer exchange.
In 1992, Hadfield became part of the Canadian Space Agency and was assigned to NASA’s Johnson Space Center in Houston, as a technical and safety specialist for Shuttle Operations Development. He participated in two space missions – STS-74 and STS-100 in 1995 and 2001, respectively – as a Mission Specialist. These missions involved rendezvousing with Mir and the ISS.
On December 19th 2012, Hadfield launched in the Soyuz TMA-07M flight for a long duration stay on board the ISS as part of Expedition 35. He became the first Canadian to command the ISS when the crew of Expedition 34 departed in March 2013, and received significant media exposure due to his extensive use of social media to promote space exploration.
Forbes described Hadfield as “perhaps the most social media savvy astronaut ever to leave Earth”. His promotional activities included a collaboration with Ed Robertson of The Barenaked Ladies and the Wexford Gleeks, singing “Is Somebody Singing?“(I.S.S.) via Skype. The broadcast of this event was a major media sensation, as was his rendition of David Bowie’s “Space Oddity“, which he sung shortly before departing the station in May 2013.
For his service, Hadfield has received numerous honors, including the Order of Canada in 2014, the Vanier Award in 2001, NASA Exceptional Service Medal in 2002, the Queen’s Golden Jubilee Medal in 2002, and the Queen’s Diamond Jubilee Medal in 2012. He is also the only Canadian to have received both a military and civilian Meritorious Service Cross, the military medal in 2001 and the civilian one in 2013.