The vast majority of successful launches and landings of SpaceX rockets have been of the Falcon 9, though that has taken several forms as SpaceX iterated upon the original design.

SpaceX made some history during a Jan. 21 Starlink satellite launch from California, landing an orbital-class rocket for the 400th time.

The U.S. has entered a new era of heavy-lift launch—one of choice. The inaugural flight of privately owned Blue Origin’s New Glenn rocket also kicks off what promises to be a busy year for developers.