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ScienceCasts: Did Earth Have Two Moons?

ScienceAtNASA ScienceAtNASA·117 videos
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Uploaded on Sep 22, 2011

Visit http://science.nasa.gov/science-news/... for the full story.

Did our planet once have two moons? Some researchers say so. Moreover, the missing satellite might still be up there--splattered across the far side of the Moon. NASA's GRAIL mission could help confirm or refute the "two moon" hypothesis.

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Top Comments

  • kdc43

    kdc43 4 months ago

    I am a moron and this video is simple for me, So how much MORE dumber are you than me is a concept that is difficult for me to understand.

    · 20

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    in reply to Son Goku (Show the comment)
  • thebigJ1er

    thebigJ1er 2 months ago

    The object was too big to have been the second moon.

    · 4

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    in reply to Daniel s (Show the comment)

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  • Xianghua Smiles

    Xianghua Smiles 1 day ago

    I'm gonna work for NASA someday...

    ·

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  • gesundheitk

    gesundheitk 5 days ago

    Our universe is fascinating

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  • Jock Knew

    Jock Knew 1 week ago

    its the moon and pluto

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  • ElliottAero

    ElliottAero 1 week ago

    wait what if the other moon was orbiting our todays moon

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  • ElliottAero

    ElliottAero 1 week ago

    i thought of this 4 years ago

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  • errolcrisanto4

    errolcrisanto4 1 week ago

    lol 2:02 happened 4 and 1/2 billion years ago when all the continents were together and all of them are like in modern times XD

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