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The discovery that changed the way we see our universe: 51 Pegasi b

The discovery that changed the way we see our universe: 51 Pegasi b

This year we celebrate the discovery of 51 Pegasi b in October, 1995. This giant planet is about half the size of Jupiter and orbits its star in about 4 days. '51 Peg’ helped launch a whole new field of exploration.

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NASA/JPL-Caltech

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