Gravity is a property of all objects that have . It is a tiny force, but has an range. It is attractive force, so it objects together.

Gravity is responsible for many processes in the universe. Planets stars because of gravity. Gravity provides the force.

An orbit of a planet is a slightly squashed circle called an . The further out a planet is, the it takes for it to complete an orbit.

Satellites orbit a planet in the same way as planets orbit a star. They are towards the planet all the time, but they miss the ground.

Geostationary satellites have an orbital period that is the as the Earth's rotational period. This means that they stay above the same point on the ground all the time. Monitoring satellites are in a orbit, which means that the Earth rotates below the orbit.