Liftoff! The ULA Delta IV Heavy Rocket Clears the Launch Pad With NASA’s Parker Solar Probe
Booster ignition and liftoff of the United Launch Alliance Delta IV Heavy rocket at 3:31 a.m. EDT, from Space Launch Complex 37 at Cape Canaveral Air Force Station in Florida, carrying NASA’s Parker Solar Probe.
About four minutes into flight, a series of key events occurs in rapid succession: Delta IV port and starboard booster engines shut down and separate, main booster engine cutoff, separation of the booster from the second stage, ignition of the second stage main engine, then jettison of the payload fairing.
