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 ...

Recalling the relationship between force and period of circular motion, the period, radius and mass of the satellite are related to the centripetal force pulling the satellite away from a straight ...

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 ...