Live coverage: Atlas 5 countdown and launch journal

The United Launch Alliance Atlas 5 rocket was transferred from its assembly building to the pad at Cape Canaveral’s Complex 41 today for Friday’s launch of NASA’s Tracking and Data Relay Satellite-M that directly supports the International Space Station and various science missions.

A Russian-built Soyuz rocket lifted off from South America at 0848 GMT (4:48 a.m. EDT) Tuesday with two new navigation satellites for Europe’s Galileo system, readying the network for initial operating capability later this year.

Two American astronauts and one Russian cosmonaut boarded their Soyuz MS-06 landing craft for a homecoming Tuesday night, U.S. time, concluding 168 days in orbit. The trio undocked from the International Space Station at 5:08 p.m. EST (2208 GMT), and landed on the snowy steppe of Kazakhstan at 9:31 p.m. EST (0231 GMT Wednesday).