Assertion: impact hypothesis | /r/CapableOf | call the theia impact
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: The giant-impact hypothesis, sometimes called the Big Splash, or the Theia Impact, suggests that Luna (the Moon) formed from the ejecta of a collision between the proto-Earth and a Mars-sized planetesimal, approximately 4.5 billion years ago, in the Hadean eon (about 20 to 100 million years after the Solar System coalesced).