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The AstronomersScienceCasts: Did Earth Have Two Moons?
ScienceCasts: Did Earth Have Two Moons?
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Visit http://science.nasa.gov/science-news/science-at-nasa/2011/07sep_twomoons/ 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.
Added on Apr 2, 2012 by deek
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Time: 03:00 | Views: 876 | Comments: 0
  NASA  ScienceCasts  SMD  Science  Mission  Directorate  ScienceNASA  News  GRAIL  farside  of  the  moon  lunar  gravity  origins 
  Planetary science  
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