Photos: Atlas 5 rolls out for Friday launch to GPS constellation

Watch the Atlas 5 rocket and OSIRIS-REx asteroid sample return spacecraft pre-launch news conference and the mission science briefing held on Launch-minus 2 days at the Kennedy Space Center.

Engineers at NASA’s Kennedy Space Center tasked with overseeing launches of scientific satellites and interplanetary probes will be responsible later this year for ensuring six major missions safely get into space over a span of a little more than six months, beginning with the launch of NOAA’s new GOES-S weather observatory on an Atlas 5 rocket March 1.

NASA cited the complexity of Sierra Nevada’s Dream Chaser space plane and an uncertainty of when the proposed crew transport craft would be ready to fly astronauts to the International Space Station as the primary reasons the agency picked Boeing and SpaceX for lucrative contracts to develop commercial space taxis.