Just a few names should give you an idea of the event's popularity: Planet Labs and Rocket Lab, Jeff Bezos's Blue Origin and Luxembourg's SES, Virgin Orbit, and also its publicly traded sister company, Virgin Galactic (NYSE: SPCE). Participants covered a range of topics at the space conference, in particular discussing the role of special-purpose acquisition companies in bringing space stocks public via reverse-merger IPOs. If you ask me, though, the big reveal from this month's summit was Virgin Galactic's laying out its plans to become the biggest pure-play space company in the world that has IPO'ed.