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Astronomers find multiple streams of dust spiraling into the heart of the nearby Andromeda galaxy, where a supermassive black hole lurks.

How to watch new 'Doctor Who' on Disney Plus and BBC iPlayer, as 15th Doctor Ncuti Gatwa takes control of the TARDIS.

Humanity got its first look at the other side of the Moon in 1959 when the USSR’s Luna 3 probe captured our first images of the Lunar far side. The pictures were shocking, pointing out a pronounced difference between the Moon’s different sides. Now China is sending another lander to the far side.

This time, it’ll bring back a sample from this long-unseen domain that could explain the puzzling difference.

Chang’e-6 (CE-6) launched on May 3rd and is headed for the second largest impact crater in the Solar System: the South Pole Aitken (SPA) basin. It’ll land at Apollo Basin, a sub-basin inside the much larger SPA basin.

China has placed a lander on the far side of the Moon before (Chang’e 4.) They also placed a lander on the near side of the Moon and brought back samples (Chang’e 5.) But CE-6 will be the first sample ever returned from the Lunar far side. It’s the latest mission in the Chinese Lunar Exploration Program (CLEP.)

This graphic outlines China’s Lunar Exploration Program. Image Credit: CASC

A new paper published in Earth and Planetary Science Letters outlines the significance of the CE-6 landing site and the samples it’ll return to Earth. It’s titled “Long-lasting farside volcanism in the Apollo basin: Chang’e-6 landing site.” The lead author is Dr. Yuqi Qian from the Department of Earth Sciences at The University of Hong Kong.

When the USSR’s Luna 3 probe gave us our first look at the lunar far side, it didn’t take scientists long to realize how different it is from the near side. The near side of the Moon is marked by vast basaltic lava plains called lunar mares. Mares cover about 31% of the lunar near side.

But the far side is much different. Lunar mares cover only about 2% of the lunar far side. Instead, it’s dominated by densely-cratered highlands. This is known as the lunar dichotomy. The difference likely stems from a deposit of heat-producing elements under the near side that created the lunar mares. Scientists have also proposed that a long-gone companion moon slammed into the far side, creating the highlands.

This global map of the Moon, as seen from the Clementine mission, shows the differences between the lunar near side and far side. The familiar near side is marked by dark lunar mares. The far side has very few of them. This is known as the lunar dichotomy. Credit: NASA.

“A major lunar scientific question is the cause of the paucity of farside mare basalts,” Qian and his colleagues write in their paper. “The Chang’e-6 (CE-6) mission, the first sample-return mission to the lunar farside, is targeted to land in the southern Apollo basin, sampling farside mare basalts with critical insights into early lunar evolution.” 

CE-6 samples from the far side can start to answer the questions about the differences between the two sides. In preparation for receiving the samples, Qian and his colleagues studied the Apollo Basin’s volcanism. Their work revealed diverse and puzzling volcanism.

Their research shows that the Apollo basin experienced volcanic activities lasting from the Nectarian (~4.05 billion years ago) to the Eratosthenian Period (~1.79 billion years ago). However, since the far side’s crust is much thicker, it influenced the volcanic activity. In regions like the Oppenheimer Crater, where the crust has intermediate thickness, lava dikes stall beneath the crater floor. Lava spreads laterally and forms a sill and floor-fractured crater.

These two images give context to the CE-6 landing site. The left image shows where Apollo is inside the SPA. The right image shows some of the features in the Apollo crater, with the landing zone in a white rectangle. Image Credit: Qian et al. 2024.

Some regions, like the inner floor of the Apollo crater, have thin crusts. Here, lava dikes erupted directly and formed extensive lava flows. But where the crust is thickest, in the highland regions, there’s no evidence that dikes there ever reach the surface.

“This fundamental finding indicates that the crustal thickness discrepancy between near side and far side may be the primary cause of lunar asymmetrical volcanism,” said Dr. Qian. “This can be tested by the returned Chang’e-6 samples.”

They’ve chosen Apollo Crater’s Southern Mare partly because it contains at least two historic eruptions from two different times. Each one has a different Titanium content. The earlier one occurred ~3.34 billion years ago and has a low Titanium content (3.2% by weight.) The later one occurred ~3.07 billion years ago and has a higher Titanium content (6.2% by weight.)

This figure from the study shows the prime location for collecting samples according to the authors. This region would provide samples from the older, low-Ti basalts, the younger high-Ti basalts, and also overlying impact ejecta from the Chaffee S crater. Image Credit: Qian et al. 2024.

The titanium content in the rock is relevant because of petrogenesis, the origin and formation of rocks. Scientists think that high-Ti and low-Ti lunar basalts form when different geological layers of the Moon melted. “CE-6 samples returned from the unique geological setting will provide significant petrogenetic information to address further the paucity of farside mare basalts and the lunar nearside-farside dichotomy,” the authors write.

The authors suggest that CE-6 collect samples from the edge of the later eruption with the higher Titanium content. That sample will have higher scientific value because it’ll actually sample three things at once: Newer high-Ti basalt, underlying low-Ti basalt, and other materials unrelated to the mares that were transported by impact events. “Diverse sample sources would provide important insights into solving a series of lunar scientific questions hidden in the Apollo basin,” said Professor Joseph Michalski, a co-author of the paper also from the University of Hong Kong.

“The result of our research is a great contribution to the Chang’e-6 lunar mission. It sets a geological framework for completely understanding the soon-returned Chang’e-6 samples and will be a key reference for the upcoming sample analysis for Chinese scientists,” said Professor Guochun Zhao, Chair Professor of HKU Department of Earth Sciences and the co-author of the paper.

Chang’e 6 will deliver up to 2 kg (4.4 lbs) of lunar material. It should arrive on Earth around June 25th.

“These returned samples could help to answer questions about the evolution of high-Ti and low-Ti basalts, the influence of crustal thickness on lunar volcanism, and the most fundamental unsolved question of lunar science: What is the cause of the pronounced lunar nearside-farside asymmetry?” the authors conclude.

The post Here’s Where China’s Sample Return Mission is Headed appeared first on Universe Today.

Ultra-fast pulses of laser light can be shaped into vortices similar to smoke rings – when chained together, they can carry enough information to transmit a simple image

Ultra-fast pulses of laser light can be shaped into vortices similar to smoke rings – when chained together, they can carry enough information to transmit a simple image

A severe geomagnetic storm has just hit Earth — which means we could see auroras tonight! Here's what you'll need to know.

The post Severe Geogmagnetic Storm Has Arrived! Auroral Blast Expected Friday Night appeared first on Sky & Telescope.

A giant sunspot cluster rivaling the one that caused the Carrington Event in 1859 could trigger a cannibal coronal mass ejection. But this is unlikely to cause major problems

An American Flamingo takes a sip of water in the Indian River at Haulover Canal on Merritt Island on Thursday, Jan. 11, 2024. The American Flamingos are more common in Mexico and Cuba but the winds from Hurricane Idalia relocated them to Florida in September 2023. Kennedy Space Center in Florida shares a border with the Merritt Island National Wildlife Refuge where more than 310 species of birds inhabit the refuge.

A rare geomagnetic storm not seen for nearly 20 years could cause a stunning aurora borealis on 10 and 11 May

A rare geomagnetic storm not seen for nearly 20 years could cause a stunning aurora borealis on 10 and 11 May

NASA/Kim Shiflett

An American flamingo takes a moment to drink water in the Indian River at Haulover Canal on Merritt Island on Thursday, Jan. 11, 2024. American Flamingos are more common in Mexico and Cuba but the winds from Hurricane Idalia relocated them to Florida in September 2023.

The Merritt Island National Wildlife Refuge is northwest of Kennedy Space Center in Florida; Merritt Island’s strategic location along the Atlantic Flyway provides a resting and feeding place for thousands of wading birds, shorebirds, and songbirds. The wildlife refuge is a habitat for more than 310 species of birds, 25 mammals, 117 fishes and 65 amphibians and reptiles.

Image Credit: NASA/Kim Shiflett

Asteroid Apophis is heading to Earth, and scientists have revealed three tiny spacecraft concepts that could race to meet the space rock in April 2029.

From left to right, Cielo Torres, Jacob Liorca, Thomas Jaycard, and Gavin Fitzgerald work on a robotic rover inside the University of Central Florida’s robotics lab ahead of the 2024 Lunabotics Challenge. University of Central Florida/Antoine Hart

NASA’s 2024 Lunabotics Challenge offers more than 40 college teams from across the country the chance to design, build, and operate their own lunar robots, with the top 10 teams advancing to the final demonstrations phase. Media are invited to attend the finals on May 16-17 at the Kennedy Space Center Visitor Complex in Florida.

The teams’ autonomous rovers must be capable of building a berm structure from lunar regolith to protect critical Artemis infrastructure on the Moon. Such berms could defend against blast and ejecta during lunar landings and launches, shade cryogenic propellant tank farms, shield a nuclear power plant from space radiation, and provide other uses.

“The task of robotically building berm structures will be important for preparation and support of crewed lunar missions,” said Kurt Leucht, NASA software developer and In-Situ Resource Utilization (ISRU) researcher, as well as longtime Lunabotics commentator. “These competing teams are not only building critical engineering skills that will assist their future careers, they are literally helping NASA prepare for our future Artemis missions to the Moon.”

Coverage of Lunabotics will include live streaming of the first round and final round throughout the duration of the competition.

Reporters interested in attending the Lunabotics finals must contact Isabel Kennedy at isabel.kennedy@nasa.gov.

The first round of the challenge takes place May 12-14 in the Exolith Lab at the University of Central Florida in Orlando. Those wishing to attend the first round of the challenge should contact Margot Winick at margot.winick@ucf.edu.

Coordinated by NASA’s Office of STEM Engagement, Lunabotics has taken place annually since 2010. As one of NASA’s Artemis Student Challenges, the competition is designed to engage and retain students in STEM fields by expanding opportunities for student research and design in the areas of science, technology, engineering, and math.

For more competition information, visit:

https://www.nasa.gov/learning-resources/lunabotics-challenge/

– end –

Derrol Nail
Kennedy Space Center, Fla.
321-289-9513
derrol.j.nail@nasa.gov

Scientists have calculated the rotational speed of asteroid 2024 BX1, which exploded over Berlin earlier this year, by letting it trail in images of the sky. It turns out, 2024 BX1 was spinning faster than any other near-Earth object ever seen.

The foundation is set at NASA’s Kennedy Space Center in Florida for launching crewed missions aboard the agency’s larger and more powerful SLS (Space Launch System) Block 1B rocket in support of Artemis IV and future missions. On May 9, 2024, teams with NASA’s EGS (Exploration Ground Systems) Program and contractor Bechtel National Inc. transferred the primary base structure of the mobile launcher 2 to its permanent mount mechanisms using the spaceport’s beast-mode transporter – the crawler.  

On Thursday, May 9, 2024, teams with NASA’s Exploration Ground Systems Program and primary contractor, Bechtel National, Inc., continue moving the base structure of mobile launcher 2 to a permanent mount structure where assembly will be completed at Kennedy Space Center in Florida. The 355-foot-tall mobile launcher 2 with a two-story base and a tower will be used to assemble and process the SLS (Space Launch System) rocket and Orion spacecraft in the Vehicle Assembly Building on NASA’s upcoming Artemis missions to the Moon beginning with Artemis IV.Photo credit: NASA/Madison Tuttle

“Seeing mobile launcher 2 take shape has been incredible,” said Shawn Quinn, program manager for NASA’s EGS Program. “Anytime we can see the manifestation of our work into physical hardware means a lot to the EGS team. It is also inspiring for the future of Artemis, with each bolt and truss put in place signifying the next phase of humanity’s return to the Moon.” 

Why is the “Jack & Set” process necessary?

Teams at Bechtel fabricated temporary pedestals 8 feet off the ground, facilitating a much more efficient and safer initial steel build process by sitting lower to the ground. These extremely large steel truss subassemblies, some weighing over 100,000 pounds each, sat on temporary bases. Once the entire 2.6 million-pound skeleton of the base was fully torqued and welded, teams used a specialized heavy-duty jacking system to raise the base to allow sufficient space for the spaceport’s crawler to be situated underneath the structure ahead of repositioning. 

Four self-propelled modular transporters were driven underneath the sides of the steel assembly and then lowered the base onto eight surrounding jacks. Once secured, teams removed the transporters and used jacks to raise the base 18 feet to allow for crawler access underneath the structure. The crawler was then positioned under the new base skeleton, raised the structure a few inches higher, and repositioned it about 200 feet to the six permanent pedestals, called mount mechanisms, completing the “jack and set” operation.  

“The jack & set milestone is a huge accomplishment for the NASA and Bechtel team,” said Darrell Foster, ground systems integration manager for NASA’s EGS Program.  “It represents the hard work of hundreds of people – not only in the field putting the pieces together, but engineers and analysts who custom designed this structure, subcontracting buyers and delivery managers who drove the process to get the materials to the site, and the several offsite fabrication shops across the country.”  

With NASA’s iconic Vehicle Assembly Building in the background, teams with the agency’s Exploration Ground Systems Program and primary contractor, Bechtel National, Inc. continue construction on the base of the platform for the new mobile launcher at Kennedy Space Center in Florida on Wednesday, April 24, 2024. Once completed and able to be carried atop the crawler-transporter, the 355-foot-tall mobile launcher 2 will be used during assembly, processing, and launch of the SLS (Space Launch System) rocket and Orion spacecraft on NASA’s upcoming Artemis missions to the Moon beginning with Artemis IV.Photo credit: Isaac Watson

Now poised atop the new launch mount mechanisms at its park site near the spaceport’s Vehicle Assembly Building, teams will begin installing critical piping and electrical equipment inside the base. The mobile launcher will remain at the park site throughout the build and commissioning phases of the project. 

The mobile launcher serves as the primary interface between the ground launch systems, SLS rocket, and Orion spacecraft that will launch the SLS Block 1B rocket, with its enhanced upper stage, to the Moon, allowing the agency to send astronauts and heavier cargo into lunar orbit than its predecessor, SLS Block 1. With Artemis, NASA will land the first woman, first person of color, and its first international partner astronaut on the lunar surface and establish long-term exploration for scientific discovery and to prepare for human missions to Mars.  

The FAA announced May 10 that it will prepare an environmental impact statement for SpaceX's planned work with Starship at NASA's Kennedy Space Center in Florida.

Exoplanets are a fascinating astronomy topic, especially the so-called “Hot Jupiters”. They’re overheated massive worlds often found orbiting very close to their stars—hence the name. Extreme gravitational interactions can tug them right into their stars over millions of years. However, some hot Jupiters appear to be spiraling in faster than gravity can explain.

WASP-12b is a good example of one of these rapidly spiraling hot Jupiters. In about three million years, thanks to orbital decay, it will become one with its yellow dwarf host star. Both are part of a triple-star system containing two red dwarf stars. The hot Jupiter orbits the dwarf in just over one Earth day at a distance of about 3.5 million kilometers. That’s well within the orbit of Mercury around the Sun. Thanks to that orbit and gravitational influence, one side of the planet always faces the star. That heats only one side and puts the surface temperature at about 2,200 C. Eventually heat flows to the opposite side, which stirs up strong winds in the upper atmosphere. The planet doesn’t reflect much light, and astronomers have described it as a pitch-black world.

As if all that isn’t odd enough, the gravitational pull of the nearby star distorts this hot Jupiter into an egglike shape. It’s also stripping the planet’s atmosphere away. So, it’s no wonder astronomers described WASP-12b as a doomed planet.

Artist’s impression of WASP-12b, a Hot Jupiter deformed by its close orbit to its star. Credit: NASA What’s Tugging on Hot Jupiters?

According to conventional theory, a hot Jupiter planet like WASP-12b should create strong gravitational tidal waves between themselves and their parent stars. Those waves transfer energy, which tugs at the planet. That pulls the planet right into the star. Such a fiery death is definitely in WASP-12b’s future. But, there’s just one problem: it’s getting sucked in faster than gravitational tidal waves can explain. What’s happening?

A team of scientists at Durham University in England studied WASP-12b and they’ve come up with an interesting idea. What if this hot Jupiter’s fate is determined by magnetic fields? That’s what Durham’s Craig Duguid proposed in a recently published paper. Duguid’s team thinks the strong magnetic fields inside some stars can dissipate the tidal waves generated by orbiting hot Jupiters.

Artist’s concept of the exoplanet WASP-12b, parent star devouring its hot Jupiter planet. Artwork Credit: NASA, ESA, and G. Bacon (STScI)

How this works isn’t completely confirmed yet, but here’s the basic idea. Inwardly propagating internal gravity waves (IGWs) (such as those from the nearby hot Jupiter) move through a star. They eventually run into the star’s magnetic interior. If that magnetic field is strong enough, it transforms them into magnetic waves. They move back outward and eventually dissipate. In the process, however, that dissipation causes a huge energy drain. The result is still the same as with gravitational tidal waves: the hot Jupiter loses energy and plows into its parent star. And, it could explain why some hot Jupiters spiral into their stars more quickly than expected.

Exploring the Magnetic Mechanism Idea

In the paper, Duguid and his team used models of stars with convective cores—such as F-type stars with masses between 1.2 to 1.6 solar masses. Astronomers suspect these experience weak tidal dissipation. The team used the known properties of these stars’ interiors, along with estimates of their magnetic fields. For these stars, a convective core is the dynamo that generates the magnetic field. Although it’s classified as a type-G star, WASP-12 fits into the study, thanks to its near-solar mass and radius.

So, is it just gravitational tidal waves pulling the planet in, or could the proposed magnetic field action be at work? Duguid and colleagues concluded that the magnetic field idea is very possible. They write, “Our main result is that this previously unexplored source of efficient tidal dissipation can operate in stars within this mass range for significant fractions of their lifetimes. This tidal dissipation mechanism appears to be consistent with the observed inspiral of WASP-12b and more generally could play an important role in the orbital evolution of hot Jupiters—and to lower-mass ultra-short-period planets—orbiting F-type stars.”

Need More Data about Hot Jupiters

It’s an interesting result. There are a great many hot Jupiters in the exoplanet archives, simply because they are the easiest exoplanets to observe. Some of them are spiraling in faster than expected. This leads the authors to suggest that additional studies of similar-type stars and their hot Jupiters could confirm the magnetic mechanism. In addition, future observations could help astronomers also understand the tidal wave theory and help place some constraints on the types of stars where it would operate.

For More Information

Scientists Explain Why Some Exoplanets are Spiraling Towards Their Stars
An Efficient Tidal Dissipation Mechanism via Stellar Magnetic Fields

The post Why Hot Jupiters Spiral into Their Stars appeared first on Universe Today.

The Large and Small Magellanic Clouds are well known satellite galaxies of the Milky Way but there are more. It is surrounded by at least 61 within 1.4 million light years (for context the Andromeda Galaxy is 2.5 million light years away) but there are likely to be more. A team of astronomers have been hunting for more companions using the Subaru telescope and so far, have searched just 3% of the sky. To everyone’s surprise they have found nine previously undiscovered satellite galaxies, far more than expected. 

Data from Gaia (the satellite collecting accurate position information of astronomical objects) suggests that most of the satellite galaxies orbiting our own are newcomers! Even the Large and Small Magellanic Clouds are now known to be newcomers. Whether any of these will fall into orbit around the Milky Way is as yet unknown, largely because we do not have an accurate measure for the mass of our home Galaxy.

The recent search hopes to expand our understanding of this corner of the Universe with the first detailed search for companion dwarf galaxies. The paper from lead author Daisuke Homma and team from the National Astronomical Observatory of Japan reports on the findings of their survey using the Subaru Telescope. 

Based on Mauna Kea in Hawaii The Subaru Telescope is an 8.2m diameter telescope located at the Mauna Kea Observatory in Hawaii. Until 2005 it was the largest single mirror telescope in the world with a gigantic 8.2 metre mirror. In all telescopes, larger mirrors collect more light bringing with it the ability to see fainter objects and finer levels of detail. A number of telescopes have now surpassed Subaru’s massive light collecting power but multi-mirror telescopes are becoming more popular. 

As the cornerstone of the study is a drive to understand dark matter distribution. The concept of the Universe being dominated by cold dark matter nicely describes the large scale model of the cosmos. It struggles however, to describe the structure in the local Universe predicting hundreds of satellite galaxies to the Milky Way. Until recently, we only knew of a handful of satellite galaxies contradicting the model in a quandary known as the missing satellites problem. The team from Japan hopes their work will help provide clues to understand this problem.

The paper reports that the previous data obtained before 2018 of an area of sky covering 676 degrees2 revealed three candidate satellite galaxies; Vir I, Cet III and Boo IV. Data released over the three years that followed covering 1,140 degrees2 revealed two additional candidates; Sext II and Vir III. Unexpectedly, the model suggests there should be  3.9 ± 0.9 satellite galaxies within 10 pc within the virial radius of the Milky Way (based on the density distribution of the Milky Way). Instead the team found more, nine to be precise! It seemed then that the missing satellite problem was no worse than expected, indeed there were too many galaxies!

The team acknowledged that their research was based on statistically small numbers and several assumptions had been made based on an isotropic distribution of satellites. To progress this further, there will need to be follow up studies of stars in the satellite galaxies and high resolution imaging.

Source : Final Results of Search for New Milky Way Satellites in the Hyper Suprime-Cam Subaru Strategic Program Survey: Discovery of Two More Candidates

The post Does the Milky Way Have Too Many Satellite Galaxies? appeared first on Universe Today.

The Starmus music and science festival heads to Bratislava, Slovakia for a multi-day event from May 12 to May 17. Here's what to expect.

Escape from the Empire in style with the Lego Star Wars Tantive IV.