The attractive force of gravity also keeps moons and artificial satellites in orbit around a planet. The Moon is a natural satellite. An artificial satellite is a man-made body placed in orbit ...

The satellite will act as an artificial star for astronomers to observe ... a star's temperature, its mass, the types of exoplanets orbiting it and whether they could harbor life.

Gravity is the force needed to maintain the orbit of planets, asteroids and comets around a star and moons and artificial satellites around a planet. An artificial satellite is a man-made body ...