Watch a live view of SpaceX’s Cape Canaveral launch pad (members only)

SpaceX’s next Falcon 9 rocket launch, using a previously-flown first stage booster, took a step closer to liftoff Thursday with a countdown rehearsal culminating in ignition of the launcher’s nine Merlin main engines in a hold-down firing at pad 39A at NASA’s Kennedy Space Center in Florida.

China chalked up another launch Thursday with the on-target delivery of a Beidou navigation satellite destined for an operating post in geostationary orbit more than 22,000 miles over the equator.

A replay of the United Launch Alliance Delta 4 rocket launching the Air Force’s Wideband Global SATCOM communications satellite No. 7 from Cape Canaveral, Florida.