Astrophysicists have once again enriched our knowledge of the cosmos with a new discovery: two small planets orbiting ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

The cosmos is filled with wonders yet to be discovered. One of the latest mysteries captivating scientists and space ...

A new study by Rice University researchers Sho Shibata and Andre Izidoro presents a compelling new model for the formation of ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...

Ceres is a dwarf planet in the asteroid belt between Mars and Jupiter. It's the largest object in the asteroid belt and the closest dwarf planet to Earth.

In deep space, far beyond our solar system ... once have they found an "ultra-hot Neptune" — a Neptune-size world orbiting ...

Astronomers have discovered nearly 6,000 planets beyond our own solar system. Here's how — and how we'll find even more.

The seven other planets in our solar system can be seen in the sky at once through Friday, forming a planet parade. But two ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...