Matt Williams, Author at Universe Today

June 27, 2022June 27, 2022 by Matt Williams

We Could Discover new Kinds of Particles Around Black Holes Through Gravitational Waves

The Laser Interferometer Space Antenna (LISA) consists of three spacecraft orbiting the sun in a triangular configuration. The LISA mission will study the mergers of supermassive black holes, test Einstein's theory of general relativity, probe the early Universe, and search for gravitational waves. As these passing waves ripple space and time, they will alter the lasers shining between the spacecraft, offering a different perspective on the Universe. LISA is scheduled for launch in 2015. Credit: NASA

On February 11th, 2016, researchers at the Laser Interferometer Gravitational-Wave Observatory (LIGO) announced the detection of gravitational waves (GW) for the first time. As predicted by Einstein’s General Theory of Relativity, these waves result from massive objects merging, which causes ripples through spacetime that can be detected. Since then, astrophysicists have theorized countless ways that GWs could be used to study physics beyond the standard models of gravity and particle physics and advance our understanding of the Universe.

To date, GWs have been proposed as a means of studying Dark Matter, the interiors of neutron stars and supernovae, mergers between supermassive black holes, and more. In a recent study, a team of physicists from the University of Amsterdam and Harvard University has proposed a way where GWs could be used to search for ultralight bosons around rotating black holes. This method could not only offer a new way to discern the properties of binary black holes but could lead to the discovery of new particles beyond the Standard Model.

June 25, 2022June 25, 2022 by Matt Williams

Amazing Flaky Martian Rocks Were Formed in a Stream or a Small Pond

Since 2012, NASA’s Curiosity rover has been exploring the Gale Crater for clues about Mars’ past and possible evidence that it once supported life. For the past year, this search has centered on the lower levels of Mount Sharp, a transitional zone between a clay-rich region and one filled with sulfates (a type of mineral salt). These regions can offer insight into Mars’ warm, watery past, but the transition zone between them is also of scientific value. In short, the study of this region may provide a record of the major climatic shift that took place billions of years ago on Mars.

For example, this region has unique geological features that include clay minerals that appear as flaky layers of sedimentary rock. One in particular, “The Prow,” was recently imaged by Curiosity and had the mission science teams buzzing. These features formed when water still flowed into the Gale Crater, depositing sediment at the base of Mount Sharp. Higher on the mountain, the hill was likely covered in wind-swept dunes that hardened into rock over time. In between them is where the flaky layers formed, possibly as a result of small ponds or streams that wove them among the dunes.

June 24, 2022June 24, 2022 by Matt Williams

SpaceX is now Constructing the Starship Launch Tower at Cape Canaveral

The Starship and Superheavy fully stacked, standing behind the "Mechazilla" tower at Boca Chica, Texas. Credit: SpaceX

Remember Mechazilla, that tall launch tower at the SpaceX Starbase in Texas that will stack Starships and “catch” spent Super Heavy boosters? SpaceX began constructing an identical launch tower at Cape Canaveral in Florida, where Starships will also be launching from soon. This tower is taking shape alongside SpaceX’s Launch Complex-39A (LC-39A) facilities at NASA’s Kennedy Space Center. Once complete, the launch tower will stand about 146 meters (~480 ft) in height, making it the second-tallest space-related structure on the East Coast, second to NASA’s massive Vehicle Assembly Building (VAB).

June 23, 2022June 23, 2022 by Matt Williams

South Korea is now a Space-Faring Nation With the Orbital Launch of Their Homegrown Nuri Rocket

It looks like South Korea just joined the most exclusive club on the planet! With the launch of its Korea Satellite Launch Vehicle II (KSLV-II aka. the “Nuri” rocket) on June 21^st, the country became the latest nation to demonstrate its ability to build and launch its own rockets to space. This was the Nuri’s second launch attempt, which took place eight months after the first attempt failed to deliver a test satellite to orbit back. This time, the rocket managed to reach space and deliver a payload of satellites, making South Korea the eleventh nation to launch from its soil and the seventh to launch commercial satellites.

June 23, 2022June 23, 2022 by Matt Williams

64 Radio Telescopes Come Together to act as a Single Giant Observatory

Aerial image of the South African MeerKAT radio telescope, part of the Square Kilometer Array (SKA). Credit: SKA

Located in the Northern Cape of South Africa, the MeerKAT telescope consists of 64 powerful radio antennas dedicated to probing the mysteries of the Universe. This facility is a precursor to the future Square Kilometer Array Observatory (SKAO), which will consist of MeerKAT and the Hydrogen Epoch of Reionization Array (HERA) in South Africa and the Australian SKA Pathfinder (ASKAP) and Murchison Radio-astronomy Observatory in Australia. A primary aim of the SKAO is to understand the matter content of the Universe and what mechanisms are driving its evolution and expansion.

The best way to do this is to observe the structure of the Universe on the largest of scales, where astronomers can observe the distribution of galaxies, the nature of gravity, and the role of dark matter and dark energy. To this end, an international team of astronomers has combined the power of MeetKAT’s 64 radio telescopes to detect faint signatures of neutral hydrogen gas across cosmological scales. The resulting accuracy and sensitivity provide a demonstration of what the SKAO will be able to achieve in the near future.

June 22, 2022June 23, 2022 by Matt Williams

Chinese Astronomers Detect an Interesting (But NOT Alien) Signal With the FAST Radio Observatory

The Five-hundred-metre Aperture Spherical Telescope (FAST) has just finished construction in the southwestern province of Guizhou. Credit: FAST

The 500-Meter Aperture Spherical Telescope (FAST), (aka. Tianyan, “Eye of Heaven”), is the largest radio observatory in the world. Since the observatory became operational in January 2020, this facility has made significant contributions to radio astronomy and the Search for Extraterrestrial Intelligence (SETI). In particular, the observatory has been instrumental in detecting Fast Radio Burts (FRBs) and other cosmic phenomena that could be (but probably aren’t) possible indications of extraterrestrial communications.

Last week, while sifting through FAST data, the China Extraterrestrial Civilization Research Group (CECRG) from Beijing Normal University revealed that they discovered several signals that might be artificial in origin (a possible indication of an advanced civilization). These signals consisted of narrow-band electromagnetic radio transmission and were considered one of the best candidates for an extraterrestrial signal. Ah, but there’s a snag. According to subsequent news releases, those radio transmissions were apparently from Earth!

June 21, 2022June 21, 2022 by Matt Williams

Gaia's Massive Third Data Release is out!

It’s here! The third and largest data release (DR3) from the ESA’s Gaia Observatory has officially been made public. As promised, the DR3 contains new and improved details for almost two billion stars in our galaxy, including the chemical compositions, temperatures, colors, masses, ages, and the velocities at which stars move. The release coincided with a virtual press event hosted by the Gaia Data Processing and Analysis Consortium (DPAC) on June 13th, which featured ESA officials and guest speakers who addressed the significance of the new data.

June 20, 2022June 20, 2022 by Matt Williams

Samples of Asteroid Ryugu Contain More Than 20 Amino Acids

Artist's impression of the Hayabusa2 spacecraft touching down on the surface of the asteroid Ryugu. Credit: JAXA/Akihiro Ikeshita?

In 2014, the Japan Aerospace Exploration Agency (JAXA) dispatched its Hayabusa2 spacecraft to rendezvous with 162173 Ryugu, a Near-Earth Asteroid (NEA) that periodically passes close to Earth. In 2018, this sample-return mission reached Ryugu and spent the next year and a half studying its surface and obtaining samples from its surface and subsurface. By 2020, these samples made it back to Earth, where scientists began analyzing them in the hopes of learning more about the early history of the Solar System and answering key questions about the origins of life.

Earlier this year, the first results of the analysis showed that Ryugu is (as expected) rich in carbon, organic molecules, and volatiles (like water) and hinted at the possibility that it was once a comet. Based on a more recent analysis, eight teams of Japanese researchers (including one from JAXA) recently announced that Ryugu carries strains of no less than 20 different amino acids -the building blocks of DNA and life itself! These findings could provide new insight into how life is distributed throughout the cosmos and could mean that it is more common than previously thought.

June 17, 2022June 17, 2022 by Matt Williams

A Rare Repeating Fast Radio Burst Gives Astronomers a Chance to Study These Mysterious Objects

Fast Radio Bursts (FRBs) are among the most mysterious astronomical phenomena facing astronomers today. While hundreds of bursts have been detected since the first-ever recorded detection of an FRB in 2007 – the Lorimer Burst – astronomers are still unsure what causes them. Even more mysterious, some have occasionally been found to be repeating in nature, which has fueled speculation that they may not be natural in origin (i.e., possible alien transmissions?). Astronomers are naturally very excited whenever a repeating FRB is found, as it gives them the chance to examine them closer.

In a recent survey, an international team of scientists used three major telescopes worldwide to study a repeating FRB (known as FRB 190520) that was first observed in 2019. According to their observations, this particular FRB is not just a repeating source from a compact object but a persistent one that emits low-level bursts of radio waves between larger ones. These findings raise new questions about the nature of these mysterious objects and how they can be used as tools to probe the space between stars and galaxies.

June 16, 2022June 16, 2022 by Matt Williams

Starship is one Step Closer to Flight

As Tom Petty famously sang, “waiting is the hardest part!” This has surely been the case for Elon Musk and the crews at the SpaceX Starbase near Boca Chica, Texas! As of this year, the company had finished flight tests with the Starship prototypes, built multiple Super Heavy boosters, test-fired the new Raptor 2.0 engines, finished the “Mechazilla” launch tower, and fully stacked the first orbital prototype (SN20 and BN4). They had even finished construction on the new Starship factory at Boca Chica, where Musk’s proposed fleet of reusable spacecraft will subsequently be produced.

Alas, that’s when an interminable delay set in! It all began when the Federal Aviation Administration (FAA) began its environmental review of the Starbase in anticipation of orbital flight testing. This review was originally intended to wrap up in February but was extended until early June. However, on Monday, June 13th, the review officially concluded and declared that the Starbase was good to go for launch testing. With this major hurdle all but cleared, the company is just about ready to conduct its historic orbital flight test and validate the Starship and Super Heavy for commercial use.