Starship Super Heavy
The SpaceX Starship is both the second stage of a reusable launch vehicle and a spacecraft that is being developed by SpaceX, as a private spaceflight project. It is being designed to be a long-duration cargo- and passenger-carrying spacecraft. While it is tested on its own initially, it will be used on orbital launches with an additional booster stage, the Super Heavy, where Starship would serve as the second stage on a two-stage-to-orbit launch vehicle. The combination of spacecraft and booster is called Starship as well. Beginning in April 2019, a height reduced Starhopper prototype version began test flights. Prototype Starships are under construction and are expected to go through several iterations.