Workers is lifted into place to mate to the first stage of the Delta 2 launch vehicle that will carry the Kepler spacecraft into orbit.

On Launch Pad 17-B at Cape Canaveral Air Force Station in Florida, workers on an upper level of the launch tower watch as a strap-on solid rocket booster is lifted into place to mate to the first stage of the Delta 2 launch vehicle that will carry the Kepler spacecraft into orbit. 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