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Astronomers may have found a new Earth-size world, but there’s a twist

Astronomers are closing in on what looks like a rare prize: a world almost the size of Earth, circling a Sun-like star at a distance that gives it a familiar, year-long orbit. The candidate, known as ...
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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine'

Astronomers believe they have uncovered evidence of a previously unknown ninth planet lurking in the not-too-distant reaches of the solar system. This hypothetical world, dubbed "Planet Y," could be ...
The New York Times

Something Very Tiny Is Following Earth Around the Sun

The object, the latest “quasi-moon” detected by astronomers, could be with us for almost another 60 years. By Robin George Andrews The Earth stands alone in the solar system as a habitable world, as ...
Space.com

Bad news for alien life? Earth-size planets may be less common than we thought

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. As many as 200 worlds beyond our solar system discovered by astronomers may be larger than ...