Mathematicians calculated where the planet might be based on its effects on Uranus, and astronomers searched for less than an ...

It’s been nearly 2 centuries since a planet was discovered in the solar system. But now scientists think they’ve uncovered ...

Scientists believe they have discovered evidence of a hidden planet existing beyond Neptune, which they have named 'Planet Y'. Recently, a study analyzing the orbits of Kuiper Belt objects indicated ...

Webb uncovers methane on Makemake, showing the icy dwarf planet is more active than once thought - just like Pluto.