SpaceX and United Launch Alliance fire off rockets from both coasts.
In a Thursday doubleheader, a SpaceX Falcon 9 rocket boosted 47 more Starlink internet satellites to orbit from California, followed by the liftoff of a United Launch Alliance Delta 4 Heavy rocket from Florida carrying a classified National Reconnaissance Office spy satellite.
Two hours after the Starlink launch, at 5:18 a.m., ULA's next-to-last Delta 4 Heavy blasted off from the Cape Canaveral Space Force Station, putting on a spectacular pre-dawn show visible for miles around. The two outboard common core boosters, burning liquid oxygen and hydrogen propellants, fell away four minutes after liftoff, followed by the central core booster about 90 seconds later. The flight continued on the power of a single hydrogen-burning RL10 engine powering the rocket's second stage.
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