Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...

New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying ...

What can rocky planets orbiting in the outer parts of a solar system teach scientists about planetary formation and evolution? This is what a recent study published in Science hopes to address as a ...

A planet so distant that its starlight began traveling toward Earth around the Middle Ages has given one University of Cincinnati graduate student the kind of first look astronomers wait years for.

Scientists may have identified one of the Solar System’s most important “planet factories” hidden just beyond Jupiter.

A small, inconspicuous meteorite may be about to change our understanding of how and when our solar system formed. Tiny shavings from the meteorite Northwest Africa 12264 are challenging the long-held ...