Proposed Launch: 2009
Purpose: Space-based optical interferometer to study stars and detect extra-solar planets
The Space Interferometry Mission (SIM) is an orbiting interferometer that will link multiple
telescopes to function in unison as a much larger "virtual telescope." Its main goal is to
detect planets of varying sizes -- from huge planets the size of Jupiter down to planets a
few times as massive as Earth. It will do this by precisely locating nearby stars and looking
for signs of any wobble, which may indicate that gravity from orbiting planets is tugging at
In addition, the mission will determine positions and distances to stars with an accuracy several
hundred times greater than current telescope technology allows. This "street map" to our Milky
Way galaxy could lead to breakthrough discoveries in astronomy. The mission will determine the
distances to important signposts throughout the Milky Way, which will help us understand the
universe, determine its age and size, and predict its future.
Partnering with JPL are TRW and Lockheed Martin, as well as numerous institutions represented on
the science teams.
For more information, see the Space Interferometry Mission home page.