On Wednesday, July 24th, the prototype test vehicle for the SpaceX craft the Starhopper commenced its first untethered “hop test” at the company’s test facility in Boca Chica, Texas. This test is an important milestone for SpaceX, intended to validate the Raptor engine in free flight and bring the company one step closer to creating the super-heavy launch system that will allow for trips to the moon and Mars.
Source:
https://phys.org/news/2019-07-free-flight-spacex-starhopper-aborted.html