Photos: Atlas 5 rolls out for launch

This is the launch timeline to be followed by the Atlas 5 rocket’s ascent into space from Cape Canaveral with NASA’s Mars 2020 mission.

This is video footage documenting preparations for the commercial Orbital ATK Cygnus cargo freighter to perform the OA-7 mission to the International Space Station. Activities occurred at the Kennedy Space Center’s Space Station Processing Facility and the Payload Hazardous Servicing Facility. The craft will be boosted into orbit by a United Launch Alliance Atlas 5 rocket on April 18 at 11:11 a.m. EDT (1511 GMT).

NASA fired up four hydrogen-fueled main engines on the core stage of the first Space Launch System heavy-lift rocket Thursday in on a test stand in Mississippi, a redo of a crucial hot fire test that was cut short in January by technical issues. The engines burned more than eight minutes in an apparently successful test.