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

Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known as a ...

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 dazzling six-planet "alignment" this January.

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 ...

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

Study reveals an interstellar object's impact on planetary orbits, reshaping solar system dynamics. Discover how simulations ...

From west to east, Saturn, Venus, Neptune, Uranus, Jupiter and Mars will make an arc across Wyoming’s night sky in a parade ...