Linked from
The 29 pages that link to Giant-impact hypothesis, each with the reason it gives.
MoonRelated: It is the leading explanation for the Moon’s origin and unusual Earth-like composition.
HadeanRelated: The Moon-forming collision was a defining event in early Earth history.
CharonRelated: A giant impact is a leading explanation for the origin of the Pluto–Charon pair.
Internal structure of the MoonRelated: It frames the Moon’s initial composition and thermal state.
Moons of MarsRelated: Impact debris could account for the moons’ nearly circular, equatorial orbits.