A United Launch Alliance (ULA) Delta IV Heavy rocket will launch a U.S.

The powerful Delta IV Heavy is scheduled to lift off from Vandenberg Space Force Base in California Saturday at 5:53 p.m.

Related: The Delta IV Heavy: Powerful launch vehicle.

"We're on track to launch another national capability into space.

— Huge Delta IV Heavy rocket launches US spy satellite to orbit.

Saturday's launch will be the final Delta IV Heavy liftoff from California.

Both will launch from Florida's Space Coast, in 2023 and 2024 if all goes according to plan.

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Michael Wall is a Senior Space Writer with Space.com (opens in new tab) and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov.

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