Rocket Lab may try to launch its Electron rocket for the first time this weekend

Rocket Lab's Electron rocket is only 55 feet tall. That's puny compared to SpaceX's 230-foot Falcon 9, but size isn't everything. The Electron could become a powerful system for putting small satellites into space for cheap—the company estimates each launch will cost $5 million compared to SpaceX's (already very cheap) $60 million. And on Sunday, it may fly for the very first time.