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

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

Have astronomers observed the first exomoon, or have they spotted a weird object that could challenge the very concept of planets and moons?

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

Astronomers directly imaged a Jupiter-mass object orbiting a brown dwarf 72 light-years away, making it the strongest candidate yet for the first known exomoon.

For centuries, humans have gazed at the stars, trying to understand what lies beyond the familiar planets we know. From Mercury’s blazing orbit near the Sun to Neptune’s icy edge, our Solar System has ...

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 ...

Astronomers have found the first confirmed atmosphere around a rocky planet in another star’s habitable zone. The planet, LHS 1140 b, revealed its atmosphere through helium slowly leaking into space.

Astronomers have discovered a rare planetary system 71 light-years away, where a Jupiter-sized world orbits a brown dwarf, ...

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 ...