What keeps each of these orbits happening rather than having us go travelling off away from the sun, is something called centripetal force. TIM PEAKE:And for an explanation of what that is ...

(1) What is the radius of the orbit? We are given the speed and want the radius of the orbit. The principle is to set the gravitational force equal to the centripetal ...

Gravitational attraction provides the centripetal force needed to keep a planet in orbit around the Sun, and a satellite in orbit around a planet. For example, gravitational attraction between the ...