Three planets for Upsilon Andromedae

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Nature 398, 659 (22 April 1999) | doi:10.1038/19409

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Jack J. Lissauer¹

In 1997, a planet of roughly Jupiter's mass was discovered in orbit around the star Andromedae. Two more have now been identified.

Jack J. Lissauer is in the Space Science Division, NASA Ames Research Center, Moffett Field, California 94035, USA.
e-mail: Email: JLISSAUER@ringside.arc.nasa.gov