Snapshots from Atlas 5 launch

An all-veteran crew of four astronauts jetted into NASA’s Kennedy Space Center Friday for the final few days of rehearsals, briefings, and relaxation before blasting off Thursday bound for a six-month stint on the International Space Station.

The robotic lander will attempt to touch down on the lunar surface at Mare Crisium near Mons Latreille Sunday morning. The anticipated landing time is no earlier than 3:34 a.m. EST (0834 UTC).

A $66 million NASA-funded science sensor package bolted on to a commercial communications satellite is ready for a ride toward a 22,000-mile-high orbital perch Thursday on a European Ariane 5 rocket, commencing a two-year mission surveying a rarely-studied region of Earth’s upper atmosphere.