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The ratios of the Moon's volatile elements are not explained by the giant-impact hypothesis. If the giant-impact hypothesis is correct, these ratios must be due to some other cause. [45] The presence of volatiles such as water trapped in lunar basalts and carbon emissions from the lunar surface is more difficult to explain if the Moon was ...
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.
The competing theories were: volcanic eruptions blasting holes in the Moon; meteoric impact; a theory known as the Welteislehre developed in Germany between the two world wars which suggested glacial motion creating the craters. Grove Karl Gilbert suggested in 1893 that the Moon's craters were formed by large asteroid impacts.
The impact sent molten debris from Earth flying into space, which eventually came together in orbit around our world and cooled to form the moon. But these theories didn’t account for the fact ...
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.
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 ...
Modern theories predict that a (conjectural) asteroid or comet impact on the Moon would create a plume of ejecta rising up from the surface, which is consistent with the monks' description. [5] The impact would be expected to perturb the Moon's motions, and laser rangefinding measurements of its libration in longitude were judged to be of the ...
Finally, a third hypothesis suggested that the Moon may have been a planetoid captured by Earth's gravity. [22] [26] [27] The modern explanation for the origin of the Moon is usually the giant-impact hypothesis, which argues a Mars-sized body struck the Earth, making a debris ring that eventually collected into a single natural satellite, the Moon.