Editing Giant-impact hypothesis (section)

=== Terrestrial magma ocean hypothesis ===

Another model, in 2019, to explain the similarity of Earth and the Moon's compositions posits that shortly after Earth formed, it was covered by a [[Magma ocean|sea of hot magma]], while the impacting object was likely made of solid material. Modelling suggests that this would lead to the impact heating the magma much more than solids from the impacting object, leading to more material being ejected from the proto-Earth, so that about 80% of the Moon-forming debris originated from the proto-Earth. Many prior models had suggested 80% of the Moon coming from the impactor.<ref>{{cite web |last1=Puiu |first1=Tibi |title=Ocean of magma blasted into space may explain how the moon formed |url=https://www.zmescience.com/space/ocean-magma-moon-formation-04232/ |website=ZME Science |access-date=12 May 2019|date=2019-04-30 }}</ref><ref>{{cite journal |last1=Hosono |first1=Natsuki |last2=Karato |first2=Shun-ichiro |last3=Makino |first3=Junichiro |last4=Saitoh |first4=Takayuki R. |title=Terrestrial magma ocean origin of the Moon |journal=Nature Geoscience |volume=12 |issue=6 |pages=418–423 |date=29 Apr 2019 |doi=10.1038/s41561-019-0354-2 |bibcode=2019NatGe..12..418H |s2cid=155215215 }}</ref>