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It came from another galaxy

Extrasolar planet traces its origin outside the Milky Way

2:34pm, November 18, 2010

Some extrasolar planets are truly out of this world.

Astronomers have for the first time discovered a planet in the Milky Way that came from another galaxy. The planet, which has a mass of at least 1.25 Jupiters, orbits an elderly star that was ripped from a small satellite galaxy some 6 to 9 billion years ago.

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