Photos: Atlas 5 on the pad for X-37B launch

Orbital ATK’s Antares rocket will deliver a Cygnus supply ship into orbit Monday to begin a three-day pursuit of the International Space Station.

The secretive winged spacecraft launched on a SpaceX Falcon Heavy rocket on Dec. 29, 2023 to conduct a classified mission. The landing concludes the seventh flight of the Boeing-built spacecraft since 2010.

This is the ascent timeline to be followed by the United Launch Alliance Atlas 5 rocket in launching NASA’s MMS mission on March 12 at 10:44 p.m. EDT.