Enlarge / SpaceX launched a Falcon 9 rocket Wednesday with six missile-tracking satellites for the US military. (credit: SpaceX)
Two prototype satellites for the Missile Defense Agency and four missile tracking satellites for the US Space Force rode a SpaceX Falcon 9 rocket into orbit Wednesday from Florida's Space Coast.
These satellites are part of a new generation of spacecraft designed to track hypersonic missiles launched by China or Russia and perhaps emerging missile threats from Iran or North Korea, which are developing their own hypersonic weapons.
Hypersonic missiles are smaller and more maneuverable than conventional ballistic missiles, which the US military's legacy missile defense satellites can detect when they launch. Infrared sensors on the military's older-generation missile tracking satellites are tuned to pick out bright thermal signatures from missile exhaust.
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