It won’t have any crew, but the U.S. Space Force is set to send the Boeing-built X-37B spacecraft — which looks like a miniature space shuttle — back for a long-duration mission to orbit during a late-night launch Thursday.

A SpaceX Falcon 9 is set to lift off with the spacecraft on the USSF-36 mission from Kennedy Space Center’s Launch Pad 39-A targeting liftoff at 11:50 p.m. during a launch window that runs from runs until 5:11 a.m., according to the Federal Aviation Administration. A backup option is available during a window from 12-5:31 a.m. Saturday.

Space Launch Delta 45’s weather squadron forecasts a 65% chance for good conditions at the opening of the window, which improves to 80% by the end of it. Similar conditions are forecast if delayed 24 hours.

The first-stage booster i

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