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 ...

A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

This video explores the key characteristics of each planet within our solar system. Suitable for teaching science at KS1 and ...

CAPE CANAVERAL, Fla. (AP) — 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 ...

For centuries, humans have dreamed about finding a new home among the stars. Earth is the only planet we know that supports ...

Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies ...

The object about 72 light-years away from Earth could be the first satellite discovered outside our solar system.

Since the first planet beyond our solar system was confirmed in the 1990s, astronomers have gone on to catalogue more than ...