The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

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

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

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

Mars will be making its closest approach to Earth in two years, and thus, the mighty red planet, named for the god of war ...

While claims of a “rare alignment” are overblown, you can still see up to six planets in the night sky this weekend. Here's ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

A rare celestial event where seven planets align is visible in the UK skies. Discover how, when, and where you can observe ...

All of our solar system's planets are lining up to take part in a rare and awesome event in the night sky - this is when and ...