how do the stars and the moon stay in space and not fall down?

Question: how do the stars and the moon stay in space and not fall down?
- Keywords:
  force,
  planet,
  space
Asked by owl4079 to Claire, Liad, Ruth, Ryan, Mako on 17 Jun 2015.
- Liad Baruchin answered on 17 Jun 2015:
  
  In order for an object to ‘fall’ down something must attract it with gravity. When we jump on Earth, the Earth itself pulls us down towards it. A lot of the planetary bodies are just far enough away from other bodies so they are not get pulled directly towards these bodies. When objects move and get pulled towards another object they sometimes get ‘locked’ in an orbit around that object, which is what happens with moons.

Question: how do the stars and the moon stay in space and not fall down?