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Blue Origin's New Glenn suffered upper-stage malfunction on April 19, stranding AST SpaceMobile's BlueBird 7 in wrong orbit. Satellite declared lost, will deorbit.

On February 10, 2009, an active Iridium communications satellite and a derelict Soviet military spacecraft slammed into each other 789 kilometers above Siberia. The collision produced more than 2,300 pieces of trackable debris that are still up there. Seventeen years later, the Iridium-Cosmos collision remains the event that made space debris a policy problem the world could no longer ignore.

SpaceX attempts its 600th Falcon 9 booster landing during the Starlink 17-22 mission, lofting 25 satellites from Vandenberg SFB on April 19.

Blue Origin's New Glenn successfully reused its first stage booster for the first time on Mission 3, launching April 19. Booster reuse accelerates operational tempo.

Five spots in the Earth-Sun system where the gravitational tug of two massive bodies and the pull of circular motion all cancel out, creating gravitational parking spaces where spacecraft can sit for decades with almost no fuel.

SpaceX attempts its 600th Falcon 9 booster landing during the Starlink 17-22 mission, adding 25 satellites from Vandenberg SFB.