Photos: More shots of Saturday’s Delta 4-Heavy rocket Launch

Europe’s Sentinel 3B environmental satellite was shipped to the Plesetsk Cosmodrome in Russia’s far northern Arkhangelsk region in March for a month-long campaign to prepare the spacecraft for liftoff aboard a Rockot launcher.

The U.S. Space Force expects to complete design validation on SpaceX’s Falcon Heavy rocket by July, ahead of the launch of the military’s first high-priority national security mission on the heavy-lifter late this year.

SpaceX founder Elon Musk detailed progress on the company’s next-generation Starship program Monday, saying the huge rocket could “probably” attempt its first launch into Earth orbit next year, and adding that the Starship will fly hundreds of missions before SpaceX puts people on-board.