Calculate the Speed of the Planets
Did you know the Earth is travelling around the Sun at nearly 107,000 kilometres per hour?
Interactive Orrery
An Orrery is a moving, mechanical model of the Solar System. It shows how all of the planets orbit around the Sun.
Kepler's Laws: Find the Mass of the Sun
Many years ago, a mathematician named Johannes Kepler created a set of rules explaining planets' movement in our Solar System.