The Space Interferometry Mission, SIM PlanetQuest, is a mission to use the tool of astrometry to investigate a broad range of topics in astronomy and astrophysics. The astronomy science plan includes the search for earth-like planets around the nearest ~ 100 stars, enumeration of the planets in multi-planet systems, and the unambiguous determination of the masses of planets. SIM is also designed to make significant contributions to the field of astrophysics, including the mass distribution of the Milky Way, including its dark matter, the search for supermassive black holes in the cores of galaxies, and precise distances to standard candles and, for the first time, a 1% extragalactic distance scale.

© 2006 Optical Society of America

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