# giant impact hypothesis

> theory that the Moon formed out of the debris left over from a collision between Earth and an astronomical body the size of Mars, approximately 4.5 billion years ago

**Wikidata**: [Q723219](https://www.wikidata.org/wiki/Q723219)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Giant-impact_hypothesis)  
**Source**: https://4ort.xyz/entity/giant-impact-hypothesis


## References

1. Freebase Data Dumps. 2013
2. Quora