SpaceX has completed the first tethered jump for its Starship prototyped, Elon Musk confirmed in a tweet Wednesday evening. Called the Starhopper because it’s making limited hops to test the landing capabilities of the Starship vehicle, the tethered jump represents the first firing of a rocket engine at the company’s Boca Chica launch site. The hops are similar to the testing that preceded the commercial development and use of SpaceX’s reusable Falcon 9 rockets.