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

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

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 ...

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

At 5.06pm UK time, a spacecraft is scheduled to launch on a journey which will take it 1.8 billion miles through our solar ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

Our universe is racing toward its destruction ... Let’s start with the area we know best — our Solar System. One billion years from now the sun will be 10% brighter than it is today This ...

And the fact that this not only would change our understanding of solar system physics, but it also gives us a new window into astrophysics, into early-universe cosmology, and into, potentially ...

Discover how a giant interstellar cloud known as the solar nebula gave birth to our solar system and everything in it. The solar system as we know it began life as a vast, swirling cloud of gas and ...

The universe is full of icy worlds that scientists ... We’ve found plenty of ice in our solar system, but no consistent liquid water is known on any moon or planetary surface aside from Earth.