When Doves Fly: Swarm Of Tiny Satellites Shot From Space Station

NanoRacks CubeSats deployed from the International Space Station in February 2014, during Expedition 38. Credit: NASA

Astronauts fired up the International Space Station’s Yard-a-Pult (actually, we mean the Japanese Kibo arm’s satellite launcher) this week to send out a flock of Doves or tiny satellites that take pictures of the Earth below. An incredible 28 satellites from Planet Labs of San Francisco are expected to swarm into orbit — the largest fleet yet, NASA says — but there have been delays in launching some of them.

The aim? To provide Earth observation information for any purpose that is needed, whether it’s disaster relief or looking to learn more about the Earth’s environment. Planet Labs and NASA say that commercial applications could include real estate, mapping, construction and oil and gas monitoring.

Deployments of two satellites each began on Tuesday and Wednesday, but NASA noted there are “glitches” (which the agency didn’t specify) that are holding up the launch of other ones. There’s no estimated date yet for sending out the rest of the satellites.

“We believe that the democratization of information about a changing planet is the mission that we are focused on, and that, in and of itself, is going to be quite valuable for the planet,” stated Robbie Schingler, co-founder of Planet Labs.

The Japanese Kibo robotic arm on the International Space Station deploys CubeSats during February 2014. The arm was holding a Small Satellite Orbital Deployer to send out the small satellites during Expedition 38. Credit: NASA
The Japanese Kibo robotic arm on the International Space Station deploys CubeSats during February 2014. The arm was holding a Small Satellite Orbital Deployer to send out the small satellites during Expedition 38. Credit: NASA

Flock 1 is a customer of the NanoRacks CubeSats program. CubeSats are small satellites that heavily rely on computer miniaturization to do the job of Earth observation and telecommunication that previously was the province of much larger and more expensive satellites. NanoRacks provides space both inside and outside the station for research experiments.

Expedition 38’s Rick Mastracchio and Koichi Wakata both commented on the unusual launches. “Two small satellites are deployed from our launcher here on the space station. Each a little bigger than loaf of bread,” Mastracchio tweeted, while Wakata wrote, “Congratulations on the successful deploy of the satellites by the NanoRacks CubeSat Deployer and Kibo robotics!”

For more information on Flock 1, check out the Planet Labs website. You can also check out an animation of how NanoRacks CubeSats deploy in the animation below (which includes a clip from the song “We Are Young” by Fun.)

China’s Yutu Moon Rover Alive and Awake for 3rd Lunar Day of Exploration despite Malfunction

This composite view shows China’s Yutu rover heading south and away forever from the Chang’e-3 landing site about a week after the Dec. 14, 2013 touchdown at Mare Imbrium. This cropped view was taken from the 360-degree panorama. See complete 360 degree landing site panorama herein. Chang’e-3 landers extreme ultraviolet (EUV) camera is at right, antenna at left. Credit: CNSA/Chinanews/Ken Kremer/Marco Di Lorenzo – kenkremer.com. See our complete Yutu timelapse pano at NASA APOD Feb. 3, 2014: http://apod.nasa.gov/apod/ap140203.htm

Yutu Lives!

The little ‘rabbit’ beloved worldwide has now phoned home and actually survived the perils of the long lunar night and is alive and awake to start a 3rd day of scientific exploration despite suffering a serious malfunction as it entered the latest hibernation period two weeks ago.

“Yutu has come back to life!” said Pei Zhaoyu, the spokesperson for China’s lunar probe program, according to a breaking news report by the state owned Xinhua news agency.

“Experts are still working to verify the causes of its mechanical control abnormality.”

The Chang’e-3 mothership lander and piggybacked Yutu surface rover soft landed on the Moon on Dec. 14, 2013 at Mare Imbrium (Sea of Rains) – marking China’s first successful spacecraft landings on an extraterrestrial body in history.

Yutu’s new lease on life also comes after Monday’s (Feb. 11) premature report of the robots demise by the state owned China News Service, reported here.

However, “Yutu failed to power-up Monday [Feb 11] and data about its current condition and repair progress is still being collected and analyzed,” Xinhua and CCTV (China state run television) reported.

This indicates that Yutu was in fact feared lost for some time by the mission team, until further efforts finally resulted in the detection of a signal from the spacecraft – and a welcome reversal of yesterdays news!

The robot “has now been restored to its normal signal reception function,” says Pei.

Side by side screenshot photos of the Chang'e-3 moon lander (L) and the Yutu moon rover during the mutual-photograph process, at the Beijing Aerospace Control Center in Beijing, on Dec. 15, 2013. The moon rover and the moon lander took photos of each other  marking the complete success of the Chang'e-3 lunar probe mission. (Xinhua/Ding Lin)
Side by side screenshot photos of the Chang’e-3 moon lander (L) and the Yutu moon rover during the mutual-photograph process, at the Beijing Aerospace Control Center in Beijing, on Dec. 15, 2013. The moon rover and the moon lander took photos of each other marking the complete success of the Chang’e-3 lunar probe mission. (Xinhua/Ding Lin)

Earlier today (Feb. 12) amateur radio operators at UHF-satcom reported detection of a signal from Yutu.

But much technical work remains ahead for the engineering and science teams to ascertain why it malfunctioned and whether the six wheeled rover can be restored to partial or full functionality.

As night fell on Jan. 25, the rover entered its second two week long period of dormancy just as the rover “experienced a mechanical control abnormality,” according to a report by China’s official government newspaper, The People’s Daily.

“Yutu went into sleep under an abnormal status,” Pei said.

“Experts were initially concerned that it might not be able to survive the extremely low temperatures during the lunar night.”

360-degree time-lapse color panorama from China’s Chang’e-3 lander This 360-degree time-lapse color panorama from China’s Chang’e-3 lander shows the Yutu rover at three different positions during its trek over the Moon’s surface at its landing site from Dec. 15-22, 2013 during the 1st Lunar Day. Credit: CNSA/Chinanews/Ken Kremer/Marco Di Lorenzo – kenkremer.com.  See our Yutu timelapse pano at NASA APOD Feb. 3, 2014: http://apod.nasa.gov/apod/ap140203.htm
360-degree time-lapse color panorama from China’s Chang’e-3 lander
This 360-degree time-lapse color panorama from China’s Chang’e-3 lander shows the Yutu rover at three different positions during its trek over the Moon’s surface at its landing site from Dec. 15-22, 2013 during the 1st Lunar Day. Credit: CNSA/Chinanews/Ken Kremer/Marco Di Lorenzo – kenkremer.com. See our Yutu timelapse pano at NASA APOD Feb. 3, 2014: http://apod.nasa.gov/apod/ap140203.htm

Each lunar day and night lasts for alternating periods of 14 Earth days.

During each long night, the Moon’s temperatures plunge dramatically to below minus 180 Celsius, or minus 292 degrees Fahrenheit.

Both solar powered probes must enter hibernation mode during each lunar night to conserve energy and protect their science instruments and control mechanisms, computers and electronics.

“The rover stands a chance of being saved now that it is still alive,” Pei stated.

Yutu, which translates as ‘Jade Rabbit’ is named after the rabbit in Chinese mythology that lives on the Moon as a pet of the Moon goddess Chang’e.

‘Jade Rabbit’ had departed the landing site forever, and was journeying southwards as the anomoly occurred – about six weeks into its planned 3 month long moon roving expedition to investigate the moon’s surface composition and natural resources.

The 140 kg Yutu robot is located some 100 m south of the lander.

Traverse Path of Yutu rover from Dec. 14 landing to Dec. 21. Landscape textured with Chang'e 3 imagery from space and ground.  Credit: CNSA/BACC
Traverse Path of Yutu rover from Dec. 14 landing to Dec. 21. Landscape textured with Chang’e 3 imagery from space and ground. Credit: CNSA/BACC

Definitive word about the Chang’e-3 lander has not yet been announced. But it is expected to survive since no malfunctions have been reported. It has a 1 year design lifetime.

Xinhua stated that Chinese space officials will comment on the landers status soon.

The 1200 kg stationary lander is expected to return science data about the Moon and conduct telescopic observations of the Earth and celestial objects for at least one year.

Chang’e-3 and Yutu landed on a thick deposit of volcanic material.

The inaugural pair of probes could be the forerunners to a manned Chinese Moon landing mission a decade from now.

China’s current plans call for the Chang’e-4 Moon lander/rover to launch in 2016, perhaps with some upgrades and lessons learned from the ongoing mission.

China is only the 3rd country in the world to successfully soft land a spacecraft on Earth’s nearest neighbor after the United States and the Soviet Union.

Stay tuned here for Ken’s continuing Chang’e-3, Orion, Orbital Sciences, SpaceX, commercial space, LADEE, Mars and more planetary and human spaceflight news.

Ken Kremer

Arecibo Observatory Undergoing Emergency Repairs After Earthquake Causes Damage

The Arecibo radio telescope in Puerto Rico.

The Arecibo Observatory’s 305 meter (1,000 ft) radio telescope is undergoing emergency repair after being damaged during a 6.4 magnitude earthquake on January 13, 2014. A large cable that supports the telescope’s receiver platform had “serious damage,” according to Bob Kerr, the Director of the Arecibo Observatory.

“A protocol structural survey following the January 13 earthquake revealed serious damage to [a] short cable section, with apparent breach of several cable strands,” Kerr told Universe Today via email. “An experienced structural engineering firm was brought to assess the damage, and to consider repair options.”

The earthquake’s epicenter was located in the ocean about 60 kilometers (37 miles) northwest of Arecibo and was one of the largest to hit Puerto Rico in several years. The quake caused some floor cracking in buildings and homes on the island, as well as power outages, but no major damages or injuries, officials said. There were, however, at least 70 aftershocks with at least three of a magnitude 3.5 or greater.

The platform hangs above the Arecibo dish, supported by cables. Via Cornell University.
The platform hangs above the Arecibo dish, supported by cables. Via Cornell University.

The famous radio observatory is located near Puerto Rico’s north coast, and opened in 1963. It was built inside a depression left by a sinkhole and is the largest curved focusing dish on Earth. The dish’s surface is made of thousands of perforated aluminum panels, each about 1 by 2 meters (3 by 6 feet), supported by a mesh of steel cables. The receiver is on a 900-ton platform suspended 137 meters (450 feet) above the dish by 18 cables running from three reinforced concrete towers.

It was one of these 18 cables that was damaged, and this particular cable was actually a known potential problem. Kerr said that during original construction of the telescope in 1962, one of the original platform suspension cables that was delivered to the observatory was too short, and another short cable section was “spliced” to provide sufficient reach to the platform.

“That cable segment and splice near the top of one of the telescope towers was consequently more rigid than the balance of the suspension system,” Kerr said. “When the earthquake shook the site, just after midnight on January 13, it is that short cable and splice that suffered damage.”

“You might say that our structural Achilles heel was exposed,” Kerr added.

Inspectors from New York’s Ammann & Whitney Bridge Construction, who have been inspecting the Arecibo observatory site since 1972, were brought in to access the situation. Kerr said a relatively low-cost (less than $100,000) repair option was designed, and materials are now being procured to complete a repair that is expected to bring the telescope back into full service.

“While the project awaits full review by the National Science Foundation, necessary steel materials for the repair are being shipped to the Observatory at this writing,” Kerr said. “Our estimated completion date for this project is March 11, 2014.”

This repair is considered temporary, however, and Kerr said a more comprehensive long-term cable repair design is being developed.

But the repair to the cable is by no means easy. The Arecibo Observatory maintenance staff will be doing the repairs themselves, working high above the ground on the 900-ton steel suspension bridge-like suspension system.

Kerr said they hope to complete this emergency repair “as expeditiously and safely as possible,” and that “it is testimony to the remarkable expertise, capability, and bravery of the Arecibo staff. I am dubious that a parallel capability exists at any other U.S. science facility.”

In the meantime, the telescope is being used only sparingly and with an “abundance of caution,” using only limited motion of the telescope. Kerr said that despite the damage, the telescope was able to continue its science mission by participation in a ten-day global ionospheric study in late January, in addition to continuing a search for pulsars in the sky above Arecibo, and searching for fast radio bursts (FRBs). Because radio telescopes can work at all times of day and in all kinds of weather, the observatory normally operates 24 hours a day. The Angel Ramos Visitor Center at the Observatory was closed for a few days, but reopened on January 22, with normal access and visiting hours.

The Observatory is recognized as one of the most important national centers for research in radio astronomy, planetary radar and terrestrial aeronomy. During its 50-plus years of use, findings from Arecibo have contributed to better understanding of the Earth’s atmosphere, the Moon, asteroids, other planets, exotic stars, our galaxy, and the large-scale galactic structure of the universe. The facility was featured in the movies “Contact” and “Golden Eye,” as well as dozens or TV shows and books, and is one of the most popular tourist attractions in Puerto Rico.

It is operated by SRI International, teaming with The Universidad Metropolitana and the Universities Space Research Association, in cooperative agreement with the National Science Foundation.

You can get more information about the Arecibo Observatory here, and here, or at the observatory’s Facebook page.

Mars’ Dingo Gap Seen From Orbit and the Ground

An orbital view from the Mars Reconnaissance Orbiter of the Curiosity rover's traverse through the Dingo Gap area of Gale crater, (top), along with a ground view from Curiosity's mastcam. Credit: NASA/JPL/University of Arizona.

Thanks to the Mars Reconnaissance Orbiter and the HiRISE camera, we have an orbital view of Dingo Gap, an opening between two low scarps which is spanned by a single dune. This gap and dune are visible both from the ground and from orbit. The Curiosity Mars rover has now crossed the gap and is continuing its travels toward enticing science destinations, including interesting veins and mineral fractures.

In the orbital image from HiRISE, the rover itself is not in this image as it was acquired before MSL landed. However, the imagery was likely used to help the rover team decide on the way to travel.

Below are more images of Dingo gap before and after the rover plowed its way through the sand.

The Curiosity rover looks back at the tracks it left after crossing through the Dingo Gap sand dune. Credit: NASA/JPL, Caltech. Via Doug Ellison on Twitter.
The Curiosity rover looks back at the tracks it left after crossing through the Dingo Gap sand dune. Credit: NASA/JPL, Caltech. Via Doug Ellison on Twitter.
The series of nine images making up this animation were taken by the rear Hazard-Avoidance Camera (rear Hazcam) on NASA’s Curiosity Mars rover as the rover drove over a dune spanning “Dingo Gap” on Mars. Image credit: NASA/JPL-Caltech
The orbital view of Gale Crater and the Dingo Gap region. Credit: NASA/JPL/University of Arizona.
The orbital view of Gale Crater and the Dingo Gap region. Credit: NASA/JPL/University of Arizona.
Curiosity looks back to ‘Dingo Gap’ sand dune after crossing over, backdropped by Mount Sharp on Sol 535, Feb. 5, 2014.  Hazcam fisheye image linearized and colorized.  Credit: NASA/JPL/Marco Di Lorenzo/Ken Kremer- kenkremer.
Curiosity looks back to ‘Dingo Gap’ sand dune after crossing over, backdropped by Mount Sharp on Sol 535, Feb. 5, 2014. Hazcam fisheye image linearized and colorized. Credit: NASA/JPL/Marco Di Lorenzo/Ken Kremer- kenkremer.
Curiosity’s view to valley beyond after crossing over ‘Dingo Gap’ sand dune. This photomosaic was taken after Curiosity drove over the 1 meter tall Dingo Gap sand dune and shows dramatic scenery in the valley beyond, back dropped by eroded rim of Gale Crater. Assembled from navigation camera (navcam) raw images from Sol 535 (Feb. 6, 2104) Credit: NASA/JPL-Caltech/Ken Kremer- kenkremer.com/Marco Di Lorenzo

Who Wants A One-Way Trip To Mars? Meet Three People Applying For Mars One

Three Mars One applicants that made it to the second round. From left, Max Fagin, Brian Hinson and Andrew Rader. (All pictures provided by the respective subjects of the photos).

If you were to find yourself on the Red Planet, what would you do when you get there? Those who made the second round of the Mars One mission (which aims to establish a colony on Mars in the next decade) are a step closer to answering that question. In interviews with Universe Today, applicants Andrew Rader, Max Fagin and Brian Hinson explained what they’ll do if they embark on a planned one-way trip to the Red Planet.

It’s impossible in three interviews to capture the diversity of more than 1,000 second-round applicants, so we encourage you to head over to Mars One’s website to browse the full list of people. As for these three would-be Marstronauts, we have their application videos and their plans for Mars exploration below the jump.

Max Fagin, 26, United States

With a resume including the NASA Academy and the Mars Desert Research Station, you’d expect that Fagin would be interested in the conventional astronaut program. He wants to try for Mars One first, however, because the Red Planet is the destination he prefers.

“Applying to become an astronaut at NASA is still an option, but at the moment they don’t have Mars as a destination,” he said. “Right now it’s the asteroids, which is cool, I’d love to see that, but it’s not something I’m willing to risk my life over.” Going to Mars would provide a greater payoff, he added, in that a new home base could be established for humanity.

One question intriguing Fagin is how to make a vehicle that travels to Mars better optimized to be used on the surface. He believes that the design will need to be changed somehow post-landing to make it possible to perform agriculture and do other duties on station. (He is in fact doing graduate engineering work at Indiana’s Purdue University right now to study more about this problem.)

Fagin is looking forward to diversifying his training if he does get selected. He’s strong in engineering, he said, but feels that learning medical skills, for example, will position all crew members well to work on the surface.

Brian Hinson, 44, United States

As you can see by the application video, Hinson is not afraid of standing out. He’s been to 39 countries and describes himself as experienced in learning about different cultures. He’s a private pilot and has also tested himself physically, for example by mountain-climbing to altitudes above 19,685 feet (6,000 meters).

“The whole Mars thing came up, and it sounds like the greatest adventure of all time,” said Hinson, who co-founded the company Skin Beautiful Dermaceuticals with his wife, Kathleen Eickholt (who is supportive of the Mars mission, but doesn’t necessarily want him to leave, he adds).

Hinson is a lifelong space enthusiast, but says his math capabilities weren’t enough to consider the NASA astronaut program. He would contribute to the mission as an engineer: “I think I could help out with hydroponics, recycle the water and everything else … [and also] picking up samples for scientists back home.”

From spending as long as 2.5 weeks on trips with strangers, Hinson added that he thinks psychological aspects will be key to success of the crew. He added that he expects the Mars One training process will include extended periods of time in isolation, perhaps something similar to the six months a science crew typically spends in Antarctica.

Andrew Rader, 34, Canada

Rader’s skills span both the technical and the human, as he earned a Ph.D. in aerospace engineering from the Massachusetts Institute of Technology and also was crowned “Canada’s Greatest Know-It-All” in a reality show competition hosted by the Discovery Channel. Mars One will only succeed as a venture if it can be “sold” to the public as a worthy endeavor, he said, adding that space enthusiasts will be among the hardest to convince because of their knowledge.

“Mars One could possibly happen if it gains enough support, if everyone donated a dollar, or space enthusiasts donated a hundred dollars [each], or billionaires donated a chunk, it could happen,” he added.

He characterizes the first few years of the colony as a time when people need to focus on the basic parts of Maslow’s hierarchy of needs. Keeping people safe and fed will come before scientific return for the first bit. His first goal on the surface will be to make the base as self-sustaining as possible. If that works out, he’d be happy to do things such as maintain rovers to pick up samples for people to analyze back at a Mars “lab”. (Having robots do surface exploration would reduce the risk of radiation, he said.)

Space is the long-term solution to the survival of our species, Rader adds, with the ultimate destination being outside the solar system. To get there first, however, you need stepping stones, and he believes Mars is the most likely destination for humans. “Mars is a very challenging place to go for us, but it is within our technological capabilities, and going there would create the technological incentives to go further.”

What are Hot Jupiters?

This artist's conception illustrates the brown dwarf named 2MASSJ22282889-431026. NASA's Hubble and Spitzer space telescopes observed the object to learn more about its turbulent atmosphere. Brown dwarfs are more massive and hotter than planets but lack the mass required to become sizzling stars. Their atmospheres can be similar to the giant planet Jupiter's. Spitzer and Hubble simultaneously observed the object as it rotated every 1.4 hours. The results suggest wind-driven, planet-size clouds. Image credit:
This artist's conception illustrates what a "hot jupiter" might look like.

When astronomers first discovered other planets, they were completely unlike anything we’ve ever found in the Solar System. These first planets were known as “hot jupiters”, because they’re giant planets – even more massive than Jupiter – but they orbit closer to their star than Mercury. Dr. Heather Knutson, a professor at Caltech explains these amazing objects.

“My name is Heather Knutson, and I’m a professor in the planetary science department here at Caltech. I study the properties of extrasolar planets, which are planets that orbit stars other than the sun, so mostly these are our closest exoplanetary neighbors. We’re not talking about planets in other galaxies – we’re mostly talking about planets which are in the same part of our own corner of our galaxy. So these are around some of the closest stars to the sun.”

What is a hot jupiter?

“The planets that I’ve found the most surprising, out of all of the ones I’ve discovered so far, I guess the sort of classic example, is that we’ve see these sorts of giant planets which are very similar to Jupiter, but orbit very much closer in than Mercury is to our sun, so these planets orbit their sun every two or three days and are absolutely getting roasted. We know that they couldn’t have formed there – they had to have formed farther out and migrated in, so what we’re still trying to understand are what are the forces that caused them to migrate in, whereas Jupiter seems to have migrated a little bit but more or less stayed put in our own solar system.”

What do hot jupiters mean for our understanding our own Solar System?

“The implications of these “hot jupiters” as we call them are actually huge for our own solar system, because if you want to know how many potentially habitable earthlike planets are out there, having one of these giant planets just rampage their way though the inner part of the planetary system, and it could toss out your habitable earth and put it into either a much closer orbit or a much further orbit. So knowing how things have moved around will tell you a lot about where you might find interesting planets.”

What is their atmosphere like?

“So, the atmospheres of hot jupiters are very exotic, by solar system standards. They typically have temperatures of a thousand to several thousand Kelvin, so at these temperatures these planets could have clouds of molten rock, for example. They have atmospheric compositions that would seem very exotic to us – they’re actually more similar to the compositions of relatively cool stars, so we have to adapt to describe these planets – we actually use stellar models to describe their atmospheres. We think that they’re also probably also tidally locked, which is very interesting because it means that one side of the planet is getting all of the heat and the other side is sort of in permanent night. And one thing we do is to try and understand the effect that has on the weather patterns on these planets, so you have winds that are pretty good at carrying that around the night side and mixing everything up, or do these planets have these just extreme temperature gradients between the day side and the night side.”

Hot Jupiter planet.  Image Credit:  ESA
Hot Jupiter planet. Image Credit: ESA

How’d they get there?

“So, we have a couple of theories for how hot jupiters may have ended up in their present day orbits. One theory is, that after they formed, that they were still embedded in the gas disc where they formed, and maybe they interacted with the disc as such that it kind of torqued and pulled them and so that’s kind of an early migration theory. There’s also a late migration theory version where when after the disc had gone away, these planets had interacted with a third body in the system, so maybe you had another distant massive planet or maybe you had a planet that was part of a binary star system, and those three body interactions excited a large orbital eccentricity in the innermost planet, and once it starts coming in closer to the star, the tides start to damp out the eccentricities, so what you end up with is something which is a gas giant planet in a very short period circular orbit.

So that’s kind of a more complicated story, but there are some clues in the data that might be true for at least a subset of the hot jupiters that we study.”

Teamwork! Two Telescopes Combine Forces To Spot Distant Galaxy Clusters

Artist's impression of the Herschel Space Telescope. Credit: ESA/AOES Medialab/NASA/ESA/STScI
Artist's impression of the Herschel Space Telescope. Credit: ESA/AOES Medialab/NASA/ESA/STScI

Doing something extraordinary often requires teamwork for humans, and the same can be said for telescopes. Witness the success of the Herschel and Planck observatories, whose data was combined in such a way to spot four galaxy clusters 10 billion years away — an era when the universe was just getting started.

Now that they have the technique down, astronomers believe they’ll be able to find about 2,000 other distant clusters that could show us more about how these collections of galaxies first came together.

Although very far away, the huge clumps of gas and dust coming together into stars is still visible, allowing telescopes to see the process in action.

“What we believe we are seeing in these distant clusters are giant elliptical galaxies in the process of being formed,” stated David Clements, a physicist at Imperial College London who led the research, referring to one of the two kinds of galaxies the universe has today. Elliptical galaxies are dominated by stars that are already formed, while spiral galaxies (like the Milky Way) include much more gas and dust.

Three false-color images of Herschel images identified by Planck. Infrared light is represented in three colors -- blue, green, and red -- that respectively show longer wavelengths. The green circle shows where Planck aimed. The co-ordinates show the location in right ascension and declination. Credit: D. Clements/ESA/NASA
Three false-color images of Herschel images identified by Planck. Infrared light is represented in three colors — blue, green, and red — that respectively show longer wavelengths. The green circle shows where Planck aimed. The co-ordinates show the location in right ascension and declination. Credit: D. Clements/ESA/NASA

This finding is yet another example of how the data from telescopes lives on, and can be used, long after the telescope missions have finished. Both Planck and Herschel finished their operations last year.

“The researchers used Planck data to find sources of far-infrared emission in areas covered by the Herschel satellite, then cross-referenced with Herschel data to look at these sources more closely,” the Royal Astronomical Society stated.

The two telescopes had complementary views, with Planck looking at the entire sky while Herschel surveyed smaller sections in higher resolution. By combining the data, researchers found 16 sources in total. A dozen of them were already discovered single galaxies, but four were the newly discovered galaxy clusters. Fresh observations were then used to figure out the distance.

You can read more details in the Monthly Notices of the Royal Astronomical Society or in preprint version on Arxiv.

Source: Royal Astronomical Society

What Is NASA For? Space Enthusiasts Fight For Agency’s Reputation On Twitter

The International Space Station. Credit: NASA

A week ago today, Slate published an article asking “What Is NASA for?” After the author opened the article comparing the United States’ space agency to a panda, he described a sort of loss of direction that fell upon NASA after the moon landings concluded in 1972. He then cited a litany of concerns he has about the agency, including human spaceflight scientific results not appearing in top journals, and the cost of the International Space Station.

Then Twitter space fans responded with a flurry of tweets under the hashtag #WhatIsNASAFor (3,994 tweets and retweets according to this graph cited by NASA Watch). Participants included NASA officials, journalists, industry and people who follow NASA and space exploration as a hobby. Several people also wrote essays in longer form (such as Deep Space Industries’ Rick Tumlinson, who argued the agency is in the middle of a paradigm shift). Below, we’ve collected some of the most interesting responses from Twitter.

Predicting climate change

Virginia’s Angela Gibson, who says in her profile that she has attended NASA Socials in the past, points to NASA’s ability to do scientific work to better understand climate change. She pointed to this animation of 2013’s warming trend as an example.

angela_gibson

Scientific inquiry and the human spirit

As always, Bad Astronomy’s Phil Plait writes an eloquent essay talking about the benefits of NASA, which range from real-time observations of the Earth’s immediate environment to the longer-term goals of promoting scientific research.

badastronomer

NASA Socials

Frequent NASA Social attendee Charissa S. talks about the first NASA launch tweetup, STS-129, as a part of why NASA means so much to her. (Full disclosure: this article’s author also attended the tweetup as a reporter.)

charissa

International collaboration

We at Universe Today frequently write about the stunning images from the Mars Reconnaissance Orbiter’s High Resolution Imaging Science Experiment (HiRISE). The HiRISE social media feeds are, thanks to volunteer effort, available in many languages, something they highlighted in a tweet.

hirise

Then there’s also the technical potential of nations working together, as feed OH, Star Stuff points out.

ohstarstuff

Career potential

NASA spokesperson Trent Perrotto talked about a long-ago trip to NASA Johnson that made him see the possibilities of working in space.

trent_perroto

And speaking of human potential, the Challenger Center’s Libby Norcross has perhaps the best retort ever by way of Tsiolkovsky.

libby_doodle

Space Station to Get a ‘Laser Cannon’

CATS in the laboratory. Credit: NASA/GSFC.

What’s a space station without a laser cannon?

The International Space Station will be getting its very own laser at the end of 2014. And unlike the planet-smashing capabilities of the Death Star of Star Wars fame, this laser will to be enlisted for the purpose of science.

It’s called CATS, and no, it isn’t the latest attempt to put feline astronauts in space. CATS stands for the Cloud Aerosol Transport System. The goal of CATS is to study the distribution of tiny particles of dust and air contaminants known as aerosols.

Developed by research scientist Matt McGill at NASA’s Goddard Space Flight Center in Greenbelt Maryland, CATS is slated to head to the International Space Station later this year on September 12th aboard SpaceX’s CRS-5 flight of the Dragon spacecraft. CATS will be installed on the Japanese Experiment Module-Exposed Facility (JEM-EF) and will demonstrate the utility of state-of-the-art multi-wavelength laser technology to study aerosol distribution and transport in the atmosphere.

Such knowledge is critical in understanding the path and circulation of aerosols and pollutants worldwide. When the Eyjafjallajökull volcano erupted in Iceland back in 2010, many trans-Atlantic flights were grounded as a precaution. These measures are necessary as several flights have suffered engine failures in the past due to encounters with volcanic ash clouds, such as the four engine failure of KLM Fight 867 in 1989 and the British Airways Flight 9 incident over Southeast Asia in 1982. Knowing where these dangerous ash clouds are is crucial to the safety of air travel.

The expanding ash cloud spewing from Iceland's Eyjafjallajökull volcano as seen from space in 2010. Credit: NASA.
The expanding ash cloud spewing from Iceland’s Eyjafjallajökull volcano as seen from space in 2010. Credit: NASA.

To accomplish this, CATS will emit 5,000 1 milliJoule laser pulses a second at the 1064, 532 and 355 nanometer wavelengths.  This represents a vast improvement in power requirements and thermal capabilities over a similar instrument currently in service aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Earth remote sensing spacecraft.

And it’s that third 355 nanometer wavelength that will make CATS stand out from CALIPSO. This will also allow researchers to differentiate between particle size and measure the horizontal and vertical distribution of aerosol particles in the atmosphere. CATS will also be capable of measuring the number of individual photons being reflected back at it, which will provide a much better resolution and understanding of current atmospheric activity.

“You get better data quality because you make fewer assumptions, and you get, presumably, a more accurate determination of what kind of particles you’re seeing in the atmosphere,” McGill said in a recent press release.

The International Space Station also provides a unique vantage point for CATS. In a highly inclined 51.7 degree orbit, the station passes over a good swath of the planet on 16 orbits daily on a westward moving ground track that repeats roughly every three days. This will assure CATS has coverage over a large percentage of the planet, including known pollutant transport routes across the northern Pacific and down from Canada over the U.S. Great Lakes region.

While the first two lasers will operate in the infrared and visual wavelengths, said third laser will work in the ultraviolet. And while this will give CATS an enhanced capability, engineers also worry that it may also be susceptible to contamination.  “If you get contamination on any of your outgoing optics, they can self-destruct, and then your system is dead. You end up with a very limited instrument lifetime,” McGill said.

Still, if CATS is successful, it may pave the way for larger, free-flying versions that will monitor long-range atmospheric patterns and shifts in climate due to natural and man-made activity. And the ISS makes a good platform to test pathfinder missions like CATS at low cost. “In our current budget-constrained environment, we need to use what we already have, such as the [station], to do more with less,” McGill said.

CALIPSO's LiDAR imaged from the ground by Gregg Hendry in 2008. Used with permission.
CALIPSO’s LiDAR imaged from the ground by Gregg Hendry in 2008. Used with permission.

The advent of a LiDAR system aboard the ISS has also generated a spirited discussion in the satellite tracking community concerning prospects for spotting CATS in operation from the ground. The CALIPSO LiDAR has been captured by ground spotters in the past. However, CALIPSO fires a much more powerful 110 milliJoule pulse at a rate of 20 times a second. Still, the lower power CATS system will be firing at a much faster rate, delivering a cumulative 5,000 milliJoules a second.  CATS won’t be bright enough to show up on an illuminated pass of the ISS, but it just might be visible during darkened passes of the ISS through the Earth’s shadow. And, unlike CALLIPSO — which is part of the difficult to observe A-Train of Earth-observing satellites — the ISS passes in view of a majority of humanity. At very least, activity from CATS will be worth watching out for, and may well be seen either visually or photographically.

We’ll soon be adding CATS to the long list of outstanding science experiments being conducted aboard the International Space Station, and the sight of this “fully armed and operational battle station” may soon be coming to a dark sky site near you!

Experts Question Claim Tunguska Meteorite May Have Come from Mars

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In 1908 a blazing white line cut across the sky before exploding a few miles above the ground with a force one thousand times stronger than the nuclear blast that leveled Hiroshima, Japan.

The resulting shock wave felled trees across more than 800 square miles in the remote forests of Tunguska, Siberia.

For over 100 years, the exact origins of the Tunguska event have remained a mystery. Without any fragments or impact craters to study, astronomers have been left in the dark. That’s not to say that all kinds of extraordinary causes haven’t been invoked to explain the event. Various people have thought of everything from Earth colliding with a small black hole to the crash of a UFO.

Russian researchers claim they may finally have evidence that will dislodge all conspiracy theories, but that “may” is huge. A team of four believes they have recovered fragments of the object — the so-called Tunguska meteorite — and even think they are Martian in origin. The research, however, is being called into question.

In a detective-like manner, the team surveyed 100 years’ worth of research. The researchers read eyewitness reports and analyzed aerial photos of the location. They performed a systematic survey of the central region in the felled forest and analyzed exotic rocks and penetration funnels.

A schematic of the Tunguska event. Image Credit:
A schematic of the central region in the felled forest due to the Tunguska event. Image Credit: Anfinogenov et al.

Previously, numerous expeditions failed to recover any fragments that could be attributed conclusively to the long-sought Tunguska meteorite. But then Andrei Zlobin, of the Russian Academy of Sciences’ Vernadsky State Geological Museum, discovered three stones with possible traces of melting. He published the results in April 2013.

Zlobin’s discovery paper was received with skepticism and Universe Today covered the news immediately. A curious question arose quickly: why did it take so long for Zlobin to analyze his samples? The expedition took place in 1988, but it took 20 years before the three Tunguska candidates were nominated and another five years before Zlobin finished the paper.

By Zlobin’s admission, his discovery paper was only a preliminary study. He claimed he didn’t carry out a detailed chemical analysis of the rocks, which is necessary in order to reveal their true nature. Most field experts quickly dismissed the paper, feeling there was more work to be done before Zlobin could truly know if these rocks were fragments from the Tunguska meteor.

Today, new research is moving forward with an analysis of the rocks originally discovered by Zlobin. But an interesting new addition to the collection is a rock called “John’s Stone” — a large boulder discovered in July, 1972. While it’s mostly a dark gray now it was much lighter at the time of its discovery. “John’s Stone has an almond-like shape with one broken side,” lead author Dr. Yana Anfinogenov told Universe Today.

Now the skeptical reader might be asking the same question as before: why is there such a large time-lapse between the discovery of John’s Stone and the analysis presented here? (It’s interesting to note that while this elusive rock has been reviewed in the literature for over 40 years, this is the first time it has appeared in an English paper). Anfinogenov claimed that new data (especially concerning Martian geology) allowed for a much better analysis today than it did in recent years.

Photos (1972) of John's Stone and related findings. Image Credit:
Photos (1972) of John’s Stone and related findings. Image Credit: Anfinovenov et al.

“The ground near John’s Stone presents undeniable impact signs suggesting that the boulder hit the ground with a catastrophic speed,” Anfinogenov told Universe Today. It left a deep trace in the permafrost which allowed researchers to note its trajectory and landing velocity coincides with that of the incoming Tunguska meteorite.

John’s Stone also contains shear-fractured splinter fragments with glossy coatings, indicating the strong effect of heat generated when it entered our atmosphere. The research team attempted to reproduce those glossy coatings found on the splinters by heating another fragment of John’s Stone to 500 degrees Celsius. The experiment was not successful as the fragment disintegrated in high heat.

“The authors do not present a strong case that the boulder known as John’s Stone was involved in the Tunguska event, or that it originated from Mars,” said Dr. Phil Bland, a meteorite expert at Curtin University in Perth, Australia.

They claim the mineral structure and chemical composition of the rocks — a quartz-sandstone with grain sizes of 0.5 to 1.5 cm and rich in silica — match rocks found on Mars. But their paper lacks any microanalysis of the samples, or isotopic study.

While there is a strong case that an impact on Mars could easily eject rock fragments that would then hit the Earth, something doesn’t match up. “The physics of ejecting material from Mars into interplanetary space argues for fragments with diameters of one to two meters, not the 20 to 30 meter range that would be required for Tunguska,” Bland told Universe Today.

It seems as though planetary geologists will require a much stronger case than this to be truly convinced John’s Stone is the Tunguska meteorite, let alone from Mars.

The paper is currently under peer-review but is available for download here.