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  • Tau Boötis b, or more precisely Tau Boötis Ab, is an extrasolar planet approximately 51 light-years away around the primary star of the Tau Boötis system in the constellation of Boötes. Announced in 1996 by Geoffrey Marcy and R. Paul Butler, Tau Boötis was one of the first stars confirmed to have planets orbiting it. On 16 December 1999, the planet was dubbed the "Millennium Planet" because the planet was then thought to be the first extrasolar planet to be discovered visually.

Freebase Commons Astronomy /astronomy

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