Replay of SpaceX's first launch and landing of 2018

The mission, only known as Zuma, was set for Thursday, pushed back to Friday and then again into the weekend.

SpaceX launched Zuma from its SLC-40 launch facility at Cape Canaveral in Florida, which was used instead of its other launch facility at Cape Canaveral because that was being employed for preparations for the launch of SpaceX's Falcon Heavy rocket.

A reason for the most recent delay was not given, reports Florida Today.

Watch a replay of the launch and landing of SpaceX's Falcon 9 rocket on January 7 at Cape Canaveral.

SpaceX kicked off the 2018 launch season with a successful mission Sunday, but its Zuma payload built by Northrop Grumman (NOC) remains unusually secretive.

Following separation of the rocket's two-stage configuration, its first stage will attempt to land at the aerospace company's Landing Zone 1, which is also located at Cape Canaveral Air Force Station.

For example, SpaceX's launch of a top-secret space drone last September was disclosed as a Boeing (BA) X-37B for the Air Force. Residents can expect to hear a sonic boom about eight minutes after launch. It's aiming for more this year, including the debut of the Falcon Heavy - a triple-core version of the Falcon 9 that will have all 27 engines firing at launch.

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