An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Worlds with liquid water could have formed just 200 million years after the big bang from the remains of the earliest ...

Six planets, Mars, Jupiter, Uranus, Neptune, Venus and Saturn can be seen in the night sky. You'll need binoculars or a ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

This once-in-a-generation shift is a pivotal power play in a saga that will unfold in the years and decades to come.

Four planets will be in the parade in January while seven will align in February. Here's how to see the events.