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

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in circular orbits around the Sun on a flat disk. But in reality, our Solar ...

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond ...

Mars is known as the 'Red Planet.' Learn about its reddish hue, caused by iron oxide, its position as the fourth planet from ...

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

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

For much of January and February, you have the chance to see six planets in our solar system after dark, although two — Uranus and Neptune — will be hard to see without a telescope or high-powered ...

If you were to perfectly follow the steps in An Idiot's Guide to Making a Solar System, you should eventually find yourself ...

A new study suggests that a planet-sized object may have passed through the solar system billions of years ago.

A planet-sized visitor possibly visited the solar system billions of years ago and permanently changed the cosmic neighbourhood by warping the orbital path of four outer planets of the system, a ...