Video: Tower rollback prior to launch of Mars Pathfinder atop a Delta 2

The 60 satellites SpaceX is set to launch Wednesday night, beginning the build-out of a broadband network of orbiting spacecraft that could eventually number thousands, are based on a new flat-panel design, with krypton-fueled plasma thrusters, high-power antennas, and a capability to autonomously steer away from other objects in space.

NASA twin GRAIL spacecraft are launched on September 10, 2011 aboard the most-powerful configuration of a Delta II rocket, the 7920H-10.

Follow the key events of the Falcon 9 rocket’s ascent to orbit 60 satellites for SpaceX’s Starlink broadband network.