Universe Today

February 27, 2024February 27, 2024 by Andy Tomaswick

Mars Had its Own Version of Plate Tectonics

Plate tectonics is not something most people would associate with Mars. In fact, the planet’s dead core is one of the primary reasons for its famous lack of a magnetic field. And since active planetary cores are one of the primary driving factors of plate tectonics, it seems obvious why that general conception holds. However, Mars has some features that we think of as corresponding with plate tectonics – volcanoes. A new paper from researchers at the University of Hong Kong (HKU) looks at how different types of plate tectonics could have formed different types of volcanoes on the surface of Mars.

February 27, 2024February 27, 2024 by Carolyn Collins Petersen

Planets in Binary Star Systems Could be Nice and Habitable

An AI-generated artist's concept of a planet in a binary star system where the orbits may not yet be in alignment. Credit: Michael S. Helfenbein.

The Star Wars world Tatooine is one of the most recognizable planets in the realm of science fiction. It’s a harsh place, and its conditions shaped the hero Luke Skywalker in many ways. In the reality-based Universe, there may not be many worlds like it. That’s because, according to a new study out from Yale researchers, the Universe likes to be more orderly, and that affects planets and their environments.

February 27, 2024February 27, 2024 by Evan Gough

New Moons Found at Uranus and Neptune

The discovery image of the new Uranian moon S/2023 U1 using the Magellan telescope on November 4, 2023. Uranus is just off the field of view in the upper left, as seen by the increased scattered light. S/2023 U1 is the faint point of light in the center of the image with the yellow arrow. The trails are from background stars. Credit: Scott Sheppard.

Astronomers have found three new moons orbiting our Solar System’s ice giants. One is orbiting Uranus, and two are orbiting Neptune. It took hard work to find them, including dozens of time exposures by some of our most powerful telescopes over several years. All three are captured objects, and there are likely more moons around both planets waiting to be discovered.

February 27, 2024February 27, 2024 by Evan Gough

Some Intelligent Civilizations Will Be Trapped on their Worlds

With thousands of exoplanets discovered so far, astronomers are learning how different planets can be. What if intelligent alien civilizations arise on extremely different habitable worlds? Some civilizations could develop space exploration technologies, but others would be trapped underwater, under ice, or in enormous gravity wells. How could they escape? Image Credit: DALL-E

Evolution has produced a wondrously diverse variety of lifeforms here on Earth. It just so happens that talking primates with opposable thumbs rose to the top and are building a spacefaring civilization. And we’re land-dwellers. But what about other planets? If the dominant species on an ocean world builds a technological civilization of some sort, would they be able to escape their ocean home and explore space?

February 26, 2024February 26, 2024 by Mark Thompson

China Names its Capsule and Lander for its Upcoming Human Lunar Missions

Illustration of chinese capsule and lander

In a recent announcement, the Chinese Space Agency (CSA) unveiled the names for its forthcoming lunar mission components. The CSA have been working towards sending humans to the Moon through a series of robotic missions. The 22-tonne capsule that is taking the astronauts to the Moon is called Mengzhuo (translates to ‘dream vessel’) and the lander has been named Lanyue (meaning ‘embracing the Moon’). Assuming all goes to plan, they will send two humans and a rover to the surface of the Moon by 2030.

February 26, 2024February 26, 2024 by Evan Gough

If Exoplanets Have Lightning, it’ll Complicate the Search for Life

Lightning on exoplanets could mask some biosignatures and amplify others. Image Credit: NASA/T.Pyle

Discovering exoplanets is almost routine now. We’ve found over 5,500 exoplanets, and the next step is to study their atmospheres and look for biosignatures. The James Webb Space Telescope is leading the way in that effort. But in some exoplanet atmospheres, lightning could make the JWST’s job more difficult by obscuring some potential biosignatures while amplifying others.

February 26, 2024February 26, 2024 by Matt Williams

Electrodes in Spacesuits Could Protect Astronauts from Harmful Dust on Mars

Martian dust could be a serious health hazard for future missions to Mars. Credit: NASA/AI. SpaceFactory

To quote NASA associate administrator Jim Reuter, sending crewed missions to Mars by 2040 is an “audacious goal.” The challenges include the distance involved, which can take up to six months to traverse using conventional propulsion methods. Then there’s the hazard posed by radiation, which includes increased exposure to solar particles, flares, and galactic cosmic rays (GCRs). And then there’s the time the crews will spend in microgravity during transits, which can take a serious toll on human health, physiology, and psychology.

But what about the challenges of living and working on Mars for several months at a time? While elevated radiation and lower gravity are a concern, so is Martian regolith. Like lunar regolith, dust on Mars will adhere to astronauts’ spacesuits and inflict wear on their equipment. However, it also contains harmful particles that must be removed to prevent contaminating habitats. In a recent study, a team of aerospace engineers tested a new electrostatic system for removing Martian regolith from spacesuits that could potentially remove harmful dust with up to 98% efficiency.

February 26, 2024February 27, 2024 by Alan Boyle

Odysseus Moon Lander Sends More Pictures — and We Know Where It Is

Odyssey's view of lunar terrain during approach to landing site — The Odysseus lander captured this image about 35 seconds after pitching over during its approach to the lunar landing site. The ultra-wide-angle view shows Odysseus and its landing legs at the bottom of the frame. (Credit: Intuitive Machines)

Four days after Intuitive Machines’ Odysseus lander made an off-kilter touchdown on the moon, the mission team is releasing snapshots that were taken during its descent.

The ultra-wide-angle images confirm that the lander is continuing to communicate with flight controllers, even though it’s lying in an awkward angle that limits how much data its antennas can transmit.

Meanwhile, images from NASA’s Lunar Reconnaissance Orbiter have identified Odysseus’ landing spot, within a mile (1.5 kilometers) of its intended target near a crater called Malapert A in the moon’s south polar region. The bad news is that the solar-powered lander may have to go dark sooner than anticipated.

February 26, 2024February 26, 2024 by Mark Thompson

Astronomers Discover a New Meteor Shower. The Source is Comet 46P/Wirtanen

Comet Wirtanen imaged using a 130P-DS Newtonian telescope on a guided HEQ5 mount and an astro modified and cooled Canon 450D. 45 two-minute images stacked using deep sky stacked to stack comet and stars separately before recombination topo remove blurring. Stub Mandrel

Like many of you, I love a good meteor shower. I have fond memories of the Leonid meteor storm back in 1999 when several hundred per hour were seen at peak. Sadly meteor storms are not that common unlike meteor showers of which, there are about 20 major showers per year. Wait, there’s another one and this time it comes from the debris left behind from Comet 46P/Wirtanen with an expected peak on December 12. Last year, 23 meteors were seen on that night that matched the location of the comets trail.

February 26, 2024March 5, 2024 by Alan Boyle

Surprise! Japan’s SLIM Moon Lander Wakes Up After a Freezing Night

Illustration: SLIM lander on the moon — An artist's conception shows Japan's SLIM lander in its upended position on the lunar surface. Credit: JAXA

Japan’s space agency didn’t expect its wrong-side-up SLIM moon lander to revive itself after powering down for a circuit-chilling lunar night on Feb. 1. But that’s exactly what happened.

“Last night, a command was sent to SLIM and a response received, confirming that the spacecraft has made it through the lunar night and maintained communication capabilities!” the SLIM mission team reported today in a posting to X / Twitter.