It will be the 20th launch for this Falcon 9's first stage, according to a SpaceX mission description. That will tie a mark set earlier this month by a different Falcon 9 booster, on a launch of SpaceX's Starlink internet satellites. SpaceX will livestream tonight's action via its X account; coverage will start about 10 minutes before liftoff.

SpaceX is gearing up for another launch! The Falcon 9 rocket is set to take off from Launch Complex 39A at the Kennedy Space Center in Florida Saturday night at 8:34 p.m. Saturday's launch is for the European Commission Galileo L12 mission to medium Earth orbit. If needed, there will be a backup opportunity on Sunday at 8:30 p.m.

SpaceX will be launching global navigation satellites for an ESA system on Saturday night - and those north of the Cape could get a show.

SpaceX successfully launched a Falcon 9 rocket carrying a satellite for the European Commission's Galileo satellite navigation system.

The launch was the first in another launch double-header from the Space Coast. The mission is known as Galileo L12, and saw the Galileo satellites launched to their intended orbit on a SpaceX Falcon 9 rocket.