Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

The mystery of how planets and icy objects formed in the farthest reaches of our solar system just took an exciting turn. A ...

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, dubbed Planet Nine, could explain the unusual clustering ...

Learn about the solar system from a pair of real space museum curators in sci-fi game Elite Dangerous, as Abbie MacKinnon and Laura Joy Pieters of the London Science Museum give a guided tour of our ...

Save guides, add subjects and pick up where you left off with your BBC account. The Sun and its planets – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune The different planets ...

Save guides, add subjects and pick up where you left off with your BBC account. Gravity provides the force needed to maintain the stable orbit of planets around a star and also of moons and ...