EARTH -- 19 Dec 2006 -- Backdropped by the blackness of space and Earth's horizon, the International Space Station moves away from Space Shuttle Discovery.

EARTH -- 19 Dec 2006 -- Backdropped by the blackness of space and Earth's horizon, the International Space Station moves away from Space Shuttle Discovery. Earlier the STS-116 and Expedition 14 crews concluded eight days of cooperative work onboard the shuttle and station. Undocking of the two spacecraft occurred at 4:10 p.m. (CST) on Dec. 19, 2006. Astronaut William A. (Bill) Oefelein, STS-116 pilot, was at the controls for the fly-around, which gave Discovery's crew a look at its handiwork, a new P5 spacer truss segment and a fully retracted P6 solar array wing. During their stay on orbital outpost, the combined crew installed the newest piece of the station's backbone and completely rewired the power grid over the course of four spacewalks -- Picture by Lightroom Photos / NASA / Topfoto