How was the solar system built and when was it built ?

Question: How was the solar system built and when was it built ?
- Keywords:
  solar system,
  space,
  time,
  universe
Asked by samschicken to Ed, Hayley, Jason, Nathan, Sophie on 13 Mar 2013.
- Hayley Evers-King answered on 13 Mar 2013:
  
  The leading theory suggests the solar system formed from the gravitational collapse of a molecular cloud about 4.6 billion years ago. Initially it formed a disk with the sun in the middle from which each of the planets formed due to the effects of gravity and rotation.

Question: How was the solar system built and when was it built ?