Stats: Atlas 5 and Delta 4 histories and backlogs (updated April 20)

Ten more satellites for Iridium’s upgraded voice and data communications fleet rode a SpaceX Falcon 9 rocket into a nearly 400-mile-high orbit from California’s Central Coast Monday.

A United Launch Alliance Delta 4-Heavy rocket, crowned by a solid-fueled upper stage kick motor, will send NASA’s Parker Solar Probe on a speedy voyage through the inner solar system following liftoff from Cape Canaveral.

On track for launch from Cape Canaveral in July, NASA’s Perseverance rover has been secured to its rocket-powered descent stage and back shell, part of the protective shield that will safeguard the robot when it arrives at Mars next year.