CAPE CANAVERAL, Fla. — A Pennsylvania billionaire is ready to attempt the first private spacewalk after SpaceX the mission was delayed by a few hours on Thursday.

Tech entrepreneur Jared Isaacman and his crew began preparing for the endeavor soon after blasting into orbit on Tuesday for a five-day flight. SpaceX announced the postponement an hour ahead of the planned start of the spacewalk.

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No explanation was immediately given, but the company said via X “all systems are looking good.”

Isaacman and a SpaceX engineer will take turns emerging from their capsule hundreds of miles above Earth, sticking close to the hatch. Two other crew members will remain strapped in their seats.

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Isaacman teamed up with SpaceX for the first commercial spacewalk to test out new spacesuits.