A long lost planet once orbited next to Earth, Apollo-era moon rocks suggest – Live Science

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  1. A long lost planet once orbited next to Earth, Apollo-era moon rocks suggest  Live Science
  2. Moon Rocks Reveal Stunning Clues About a Missing Planet  SciTechDaily
  3. A Planet Slammed Into Earth 4.5 Billion Years Ago, Forming the Moon. The Projectile May Have Been Our Neighbor  Smithsonian Magazine
  4. Was our moon made by Earth colliding with its neighbor?  MSN

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