There are no confirmed exomoons, moons orbiting distant exoplanets in other solar systems. There are a few candidates, but ...

Venture to the most distant worlds in our solar system as we chart the path to Uranus, Neptune, and Pluto. Learn about ...

Diamond rain falls on ice giants Uranus and Neptune, where intense pressure and heat transform methane into crystallizing diamonds. Scientists recreat ...

Water isn't just delivered to planets by comets and asteroids — it can also be forged as worlds form, a new study finds. For ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

There’s a bit of a paradox about our galaxy: it’s both jam-packed with stars and cavernously empty. The Milky Way is crowded in the sense that it holds hundreds of billions of stars, as well as ...

The first map of magnetic fields in a planetary formation disk has been created, revealing how invisible forces shape the ...

CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar system.

A distant gas giant the size of 10 Jupiters is now the first planet outside Earth's solar system to be mapped in three ...