Astrophysical Journal

Planet Nine: A world that shouldn't exist

Earlier this year scientists presented evidence for Planet Nine, a Neptune-mass planet in an elliptical orbit 10 times farther from our Sun than Pluto. Since then theorists have puzzled over how this planet could end up in ...

dateMay 03, 2016 in Astronomy
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Would Earth look like a habitable planet from afar?

Even when a distant world has the trademarks of habitability—it's Earth-sized, it's in the zone around its star where liquid water is possible—finding signs of life is tricky. The telescope technology of today falls short ...

dateJun 30, 2014 in Astronomy
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Mysterious X-ray signal intrigues astronomers

( —A mysterious X-ray signal has been found in a detailed study of galaxy clusters using NASA's Chandra X-ray Observatory and ESA's XMM-Newton. One intriguing possibility is that the X-rays are produced by the ...

dateJun 24, 2014 in Astronomy
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"Mini supernova" explosion could have big impact

In Hollywood blockbusters, explosions are often among the stars of the show. In space, explosions of actual stars are a focus for scientists who hope to better understand their births, lives, and deaths and how they interact ...

dateMar 16, 2015 in Astronomy
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