New Horizons' primary mission is complete. It's already completed its pass through the Pluto system and even stopped by 486958 Arrokoth, a Kuiper belt object on its way out of the solar system. But that doesn't mean it's done providing new scientific insights. A new paper looks at data collected by its ultraviolet spectrograph, which looked at one particular wavelength and helped provide context to a few different questions about the solar system.
The idea that our Solar System is representative of other solar systems hasn't survived the age of exoplanet discovery. Kepler and TESS have shown us that our system doesn't even contain the most common type of planet: sub-Neptunes. These planets pose a mystery to planetary scientists, and the JWST is helping unravel the mystery.
How do you distinguish a galaxy from a mere cluster of stars? That's easy, right? A galaxy is a large collection of millions or billion of stars, while a star cluster only has a thousand or so. Well, that kind of thinking won't get you a Ph.D. in astronomy! Seriously, though, the line between galaxy and star cluster isn't always clear. Case in point, UMa3/U1.
The solar gravitation lens (SGL) has much potential as a telescope. This point in space, located about 650 AU away from the Sun, uses fundamental properties of physics to amplify the light from extremely far-away objects, allowing us to see them at a level of detail unachievable anywhere else. However, any SGL mission would face plenty of technical and physical challenges. A new paper by independent researcher Viktor Toth is the latest in a series that discusses those challenges when imaging a far-away exoplanet, and in particular, looks at the difficulties in dealing with potential moving cloud cover. He concludes that using the SGL might not be the most effective way of capturing high-resolution images of an exoplanet, after all.
On 20 April, 2025, the African Space Agency (AfSA) was formally launched at an inauguration ceremony in Cairo, Egypt. The decision to create AfSA was made by the African Union (AU) in 2016 to coordinate the continent's approach to space, and enact the African Space Policy and Strategy. AfSA will coordinate African space cooperation with Europe and other international partners.
The center of the Milky Way is a busy place, tightly packed with stars and dominated by the supermassive black hole Sagittarius A*. It also features powerful magnetic fields that regulate star production, influence gas dynamics and gas cloud formation, and even affect the accretion processes around Sagittarius A*. Gigantic filaments of gas that look like bones form along the magnetic field lines, and one of them appears to be fractured.
Getting missions to land successfully on the Moon has been difficult. Recent missions, such as IM-1 and IM-2, which the private company Intuitive Machines completed, have been qualified successes at best, with both landers settling at unintended angles and breaking parts of them off along the way. Such experiences offer excellent learning opportunities, though, and NASA is confident that a third time might be a charm for a flawless mission. There will be a lot riding on IM-3, the third Commercial Lunar Payload Services (CLPS) mission, including a set of rovers and ground station for a NASA experiment called the Cooperative Autonomous Distribution Robotic Exploration (CADRE), which recently passed its Verification and Validation (V&V) test for one of it's most essential parts. This software architecture handles tasks for each rover and binds them into a cohesive whole.
A rare stellar occultation, which happens only once every 30 years, allowed astronomers to observe Uranus and learn more about the composition of its atmosphere and rings.
As the second-largest object in the main asteroid belt, Vesta attracts a healthy amount of scientific interest. While smaller asteroids in the belt are considered fragments of collisions, scientists think Vesta and the other three large objects in the belt are likely primordial and have survived for billions of years. They believe that Vesta was on its way to becoming a planet and that the Solar System's rocky planets likely began as protoplanets just like it. But new research is casting doubt on that conclusion.
What will a human experience while standing on the surface of Saturn’s largest moon, Titan, even with the protection of a pressurized spacesuit? This is what a recent study presented at the 56th Lunar and Planetary Science Conference hopes to address as William O’Hara, who is the Executive Director of Explore Titan investigated what physical attributes a human will experience when standing on Titan’s surface. This study has the potential to help scientists, engineers, mission planners, and the public better understand the risks associated with sending humans to far-off worlds for long periods of time and how to develop technologies to mitigate these risks.
Star birth is a process hidden inside dense crèches of gas and dust. Yet, if you know what to look for, you can see the products of this essential cosmic process across the sky. The Circinus West molecular cloud is a starbirth crèche some 2,500 light-years away. It boasts everything from dark nebulae to protostellar objects and newborn stars to the faint ghosts of stars that have already died.
How can walking robots deliver more efficient in-situ robotic exploration on the Moon compared to other types of robots? This is what a recent study presented at the 56th Lunar and Planetary Science Conference hopes to address as a team of researchers from the University of Southern California (USC) discussed the benefits of using legged robots for lunar exploration regarding gait speed (walking speed). This study has the potential to help engineers, scientists, mission planners, and astronauts develop novel robotic designs to conduct more efficient science and mission objectives on future Moon surface missions.
Earth has a number of companions in space; of course the Moon is the most well known but there are a host of smaller objects that visit us, complete a few orbits then head off again. A team of astronomers have detected four objects like this and have performed spectroscopic analyses on them. They found that their surface composition is similar to eh Moon suggesting that it’s a major source of these temporary satellites instead of the asteroid belt.
The Orion Nebula is a fabulous example of a vast cloud of electrically charged gas which is emitting bright radiation. If the atoms in the gas are cool enough though, they can form giant molecular clouds that obscure light, these are known as dark nebula. A team of astronomers have now found an enormous cloud of molecular hydrogen in our own cosmic backyard just 300 light years away. The cloud contains 3,400 times the mass of the Sun and if we could see it, it would stretch nearly 40 times the width of the Moon across the sky.
How do robots feel in space? This is both a practical and possibly an existential question. Still, today, we'll focus on the practical side by looking at a review paper from Hadi Jahanshahi and Zheng Zhu of York University in Canada that discusses different tactile sensor types and their advantages and disadvantages for use in space.
Ion drives are renowned for their efficiency. They're extremely efficient compared to chemical rockets, so they're preferred for deep space missions where propellant supplies are critical. New research shows how they could run on simple water, making them even more efficient.
It's nearly impossible to overstate the effect supermassive black holes have on their host galaxies. When actively accreting matter, they release colossal amounts of energy as winds, jets, and radiation that shape their surroundings. But stellar mass black holes also shape their surroundings with energetic jets.
Nothing wows new observers like seeing Saturn for the first time. I always check out the ringed planet if it's visible, and telescopes down the line at any star party will invariably be pointed Saturn-ward to a chorus of ‘oh’s’ and ‘ah’s’…. but 2025 gives you another reason to gaze at Saturn, as its largest moon Titan completes a series of rare shadow transits.
NASA's Psyche mission launched in 2023 and has now successfully demonstrated that laser technology can transmit high-bandwidth data across millions of kilometres in space, making it promising for communications from Mars. However, researchers simulating Martian conditions found that while this optical communication works well under normal circumstances, performance degrades during dustier periods and fails completely during global dust storms.
What kind of spacecraft can be used to explore and study the subsurface lunar environment? This is what a recent study presented at the 56th Lunar and Planetary Science Conference (LPSC) hopes to address as an international team of researchers discussed the benefits of a mission concept called LunarLeaper, which will be designed to traverse and analyze the various aspects of the lunar subsurface environment, including moon pits and lava tubes.
Since the invention of the telescope, astronomers have been hunting for objects in our Solar System in particular and more recently, for the theorised 9th planet. Observations of Kuiper Belt objects suggest a large object might be lurking in the depths of the Solar System but to date, it hasn’t been directly observed. A team of researchers have analysed infrared sky surveys and found 13 objects that matched the estimated flux and motion of Planet Nine! Further analysis ruled out 12 leaving a single object. Is this Planet Nine?
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