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The Moon's heavily cratered far-side. The origin of the Moon is usually explained by a Mars-sized body striking the Earth, creating a debris ring that eventually collected into a single natural satellite, the Moon, but there are a number of variations on this giant-impact hypothesis, as well as alternative explanations, and research continues into how the Moon came to be formed.
Artist's depiction of a collision between two planetary bodies. Such an impact between Earth and a Mars-sized object likely formed the Moon.. The giant-impact hypothesis, sometimes called the Theia Impact, is an astrogeology hypothesis for the formation of the Moon first proposed in 1946 by Canadian geologist Reginald Daly.
A co-formation of Earth and the Moon together in the primordial accretion disk does not explain the depletion of metals in the Moon. [40] None of these hypotheses can account for the high angular momentum of the Earth–Moon system. [42] The prevailing theory is that the Earth–Moon system formed after a giant impact of a Mars-sized body ...
An old theory about how Earth’s moon was formed is getting a second look. An old theory about how Earth’s moon was formed is getting a second look.
Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.
The Earth and Moon formed at the same time when the protoplanetary disk accreted The Theia-impact scenario described above The lunar rock samples retrieved by Apollo astronauts were found to be very similar in composition to Earth's crust, and so were likely removed from Earth in some violent event.
An old theory about how Earth’s moon was formed is getting a second look. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ...
Theia, an ancient planet, collided with Earth to form the moon, scientists believe. A new study suggests Theia could have also formed mysterious blobs called large low-velocity provinces, or LLVPs.