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  2. Origin of the Moon - Wikipedia

    en.wikipedia.org/wiki/Origin_of_the_Moon

    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.

  3. Giant-impact hypothesis - Wikipedia

    en.wikipedia.org/wiki/Giant-impact_hypothesis

    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.

  4. How Did the Moon Form? - AOL

    www.aol.com/did-moon-form-195400883.html

    By measuring the age of the rocks, scientists learned that the moon formed about 4.5 billion years ago, amidst the chaotic early years of our Solar System’s own formation. Today’s tools and ...

  5. Moon - Wikipedia

    en.wikipedia.org/wiki/Moon

    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 ...

  6. Theia (planet) - Wikipedia

    en.wikipedia.org/wiki/Theia_(planet)

    Theia (/ ˈ θ iː ə /) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the Moon.

  7. The moon may be much older than we thought

    www.aol.com/moon-may-much-older-thought...

    The moon may be much older than previously believed. Scientists are challenging prior conceptions about its formation some 4.35 billion years ago in a new “idea paper.” The Earth and its moon ...

  8. The moon formed inside a hot cosmic doughnut ... - AOL

    www.aol.com/2018-03-03-the-moon-formed-inside-a...

    A new theory could reshape ideas about how Earth and other planetary systems came to be, according to the team of astronomers behind it.

  9. Internal structure of the Moon - Wikipedia

    en.wikipedia.org/wiki/Internal_structure_of_the_Moon

    Thermal state of the Moon at age 100 Ma. [1] Having a mean density of 3,346.4 kg/m 3, [2] the Moon is a differentiated body, being composed of a geochemically distinct crust, mantle, and planetary core. This structure is believed to have resulted from the fractional crystallization of a magma ocean shortly after its formation about 4.5 billion ...