More than a decade of data about the particles zipping around our sun can solve mysteries from the behaviour of individual ...

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

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

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

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 ...

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

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

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

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...