SpaceX launches hefty rocket with 24 satellites, experiments

SpaceX launched its heftiest rocket with 24 research satellites Tuesday, a middle-of-the-night rideshare featuring a deep space atomic clock, solar sail, a clean and green rocket fuel testbed, and even human ashes. It was the third flight of a Falcon Heavy rocket, but the first ordered by the military. The Defense Department mission is expected to provide data to certify the Falcon Heavy — and reused boosters — for future national security launches.

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