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

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 ...

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 ...

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

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 ...

These light travel time distances to our eyes change every second because all objects in our solar system are constantly in motion in their orbit around the sun. While gazing at this celestial ...