Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's responsible for the orbits of the planets and their satellites, but there ...

That's because the planet is about to get very, very hot. You see, the sun's tremendous gravity pulls the Earth right toward it. Meanwhile, the planet is trying to whiz away in this direction.

Gravity also acts between the Moon and the Earth and keeps the Earth in orbit around the Sun. The force that pulls things to the centre of Earth (and other planets) is called gravity. Gravity also ...