On Launch Pad 17-B at Cape Canaveral Air Force Station waits for the mobile service tower at right and installation of the final three rocket boosters.

On Launch Pad 17-B at Cape Canaveral Air Force Station in Florida, the first stage of the Delta 2 launch vehicle for the Kepler spacecraft (center) waits for the mobile service tower at right and installation of the final three solid rocket boosters. The Kepler mission is specifically designed to survey our region of the Milky Way galaxy to discover hundreds of Earth-size and smaller planets in or near the habitable zone and determine how many of the billions of stars in our galaxy have such planets. Results from this mission will allow us to place our solar system within the continuum of planetary systems in the Galaxy. NASA's planet-hunting Kepler mission is scheduled to launch no earlier than March 5, 2009. Photo credit: NASA/Jim Grossmann