Space.com Big Milestones for SpaceX, Cassini and Virgin Galactic: The Week’s Top Space Stories 6 May 2017 fborgosano Leave a comment Share: SpaceX launched its first national-security mission (and landed the rocket to boot), and Virgin Galactic’s new SpaceShipTwo tested its re-entry system for the first time. Here are the most interesting things that happened in the universe this week. from Space.com bit.ly/2j7cSFz Share: