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Keyword: theiasteroids

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  • STEREO Hunts for Remains of an Ancient Planet near Earth

    04/10/2009 4:04:43 PM PDT · by decimon · 44 replies · 1,154+ views
    NASA ^ | Apr. 9, 2009 | Dr. Tony Phillips
    April 9, 2009: NASA's twin STEREO probes are entering a mysterious region of space to look for remains of an ancient planet which once orbited the Sun not far from Earth. If they find anything, it could solve a major puzzle--the origin of the Moon. "The name of the planet is Theia," says Mike Kaiser, STEREO project scientist at the Goddard Space Flight Center. "It's a hypothetical world. We've never actually seen it, but some researchers believe it existed 4.5 billion years ago—and that it collided with Earth to form the Moon." Right: An artist's concept of one of the...