"Water on a planet this small is a landmark discovery. It pushes closer than ever to characterizing truly Earth-like worlds." When you purchase through links on our site, we may earn an affiliate ...

Astronomers have revealed new evidence that not just one, but four tiny planets are circling around Barnard's Star, the ...

Astronomers announced Wednesday they have discovered a massive planet orbiting a tiny star, a bizarre pairing that has stumped scientists. Most of the stars across the Milky Way are small red dwarfs ...

NASA’s next flagship mission — the James Webb Space Telescope — will carry the largest primary mirror ever deployed. This segmented behemoth will unfold to 21.3 feet in diameter once the observatory ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion ...

Like a family in which short parents have tall children, a tiny red dwarf star is defying our understanding of how planets form by existing alongside a giant exoplanet. Giant planets are not rare per ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth. Astronomers have revealed new evidence ...