It’s been suggested in the past that life could hitch a ride on asteroids or comets to jump from world to world – a process known as panspermia. Now, a Harvard team has calculated just how likely that scenario would be throughout the Milky Way. In short: extremely.
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Astronomers have discovered a weird star system that appears to be dimming completely at random, and none of the usual explanations seem to fit.
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NASA astronomers have managed to probe the atmosphere of GJ 3470 b, a planet unlike any in our solar system. It marks the first time for this kind of world, and could be a step towards identifying potentially habitable planets.
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Three new, roughly Earth-sized exoplanets have been found orbiting a nearby star. Named L 98-59b, c and d, the small worlds were spotted by NASA’s TESS, as part of a larger haul of data that finally brings the total tally past the milestone of 4,000 exoplanets discovered to date.
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Saturn sports an impressive ring system, but Uranus also has some, although they’re usually too faint to see without a powerful telescope. Striking new images shows these rings in very clear detail thanks to thermal imaging, allowing astronomers to measure their temperature for the first time.
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NASA has given its approval to begin construction of a spacecraft that will one day explore the metallic asteroid Psyche, which may represent the exposed metallic core of what was once a Mars-sized planet.
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An international team of physicists has finally found proof of circumplanetary disks, adding substantial weight to current theoretical models of planet formation. These disks of gas surrounded by dust have eluded detection, until now.
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Another 18 exoplanets have been added to the haul, but the difference this time is that all of them are roughly Earth-sized – much smaller than the Neptune-sized average found so far. The discovery was made in old data, using a new and more sensitive algorithm.
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Studies have shown that billions of years ago Venus might have been just as habitable as Earth. So what happened? New research has found that if ancient Venus was home to vast oceans, tidal drags may have slowed down the rotation of the planet and let it bake into the lifeless world we know today.
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TRAPPIST-1 is one the most fascinating planetary systems discovered so far. Now, two new studies have looked at the habitability of these planets, with a focus on radiation from the star and tides caused by the other planets. Strangely enough, these factors could help make them more liveable.
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