Astro-Challenge: See Titan's Shadow Cross Saturn

By David Dickinson April 28, 2025
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.
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How Well Would a Laser Communication System Work from Mars?

By Mark Thompson April 27, 2025
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.
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Exploring the Moon’s Subsurface with LunarLeaper

By Laurence Tognetti, MSc April 26, 2025
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.
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Is This the First Hint of Planet Nine?

By Mark Thompson April 26, 2025
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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Webb Confirms the Coldest Planet Ever Found. It's Orbiting a White Dwarf

By Matthew Williams April 26, 2025
A few years ago, astronomers discovered an exoplanet orbiting the white dwarf 1856+534 b. Now they've used the mighty JWST to do follow-up observations and made some exciting discoveries. It's definitely a planet and not a brown dwarf, with a temperature of 186 K (-87°C/-125°F) and about 6 times the mass of Jupiter. This makes it the coldest exoplanet ever detected, and it's orbiting in the "forbidden zone," which should have been engulfed during the red giant phase.
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Hubble Spots a Magnetar Zipping Through the Milky Way

By Carolyn Collins Petersen April 26, 2025
An artist’s impression of a magnetar, which is a special type of neutron star with an incredibly strong magnetic field. Courtesy ESA.
Magnetars are among the rarest - and weirdest - denizens of the galactic zoo. They have powerful magnetic fields and may be the source of fast radio bursts (FRBs). A team of astronomers led by European Space Agency researcher Ashley Chrimes recently used the Hubble Space Telescope to track one of these monsters called SGR 0501+4516 (SGR0501, for short, and SGR stands for Soft Gamma Repeater). It's whipping through the Milky Way at a rate that could be as high as 65 kilometers per second. The big challenge was to find its birthplace and figure out its origin.
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Super Earth's are Pretty Common. We Just Don't Have One.

By Mark Thompson April 26, 2025
Since the discovery of the first exoplanet in 1992 astronomers have now found over 5,000 alien worlds around other stars. With the discoveries of exoplanets came an entirely new classification of worlds known as the super-Earth; terrestrial planets more massive than Earth but smaller than Neptune. Sadly we don’t have any such planets in our Solar System but a new report suggests planets like this are surprisingly common with at least as many as there are Neptune sized planets.
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How Kerbal Space Program is Inspiring Real Mission Designs

By Matthew Williams April 25, 2025
In a recent paper, a team of engineers from Purdue University describes how sandbox video games that offer players a high degree of freedom and creativity, like the popular Kerbal Space Program (KSP), could be used by space agencies to assist the early-mission development process.
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Curiosity is Making Tracks Across the Surface of Mars

By Mark Thompson April 25, 2025
Images of Mars never cease to amaze. This latest image of NASA’s Curiosity Rover captured by the Mars Reconnaissance Orbiter shows the rover as a dark speck and the end of a long trail of tracks. It was rattling along at a speed of 0.16 km/h across the Gediz Vallis Channel and was headed towards a region that could have been formed by water billions of years ago. The weather on Mars won’t allow the tracks to persist though so they are likely to last for only a few months.
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