NASA's Lunar Reconnaissance Orbiter launched at 5:32 pm EDT aboard an Atlas V rocket from Cape Canaveral Air Force Station in Florida. The satellite will relay more information about the lunar environment than any other previous mission to the moon. The orbiter, known as LRO, separated from the Atlas V rocket carrying it and a companion mission, the Lunar Crater Observation and Sensing Satellite. The LCROSS handoff is expected to occur in about two hours and 10 minutes.