SpaceX‘s Starship rocket on Tuesday deployed its first batch of mock Starlink satellites in space and tested new heat shield tiles on its plunge through Earth’s atmosphere, clinching development milestones that had been held up by a streak of previous testing failures.

SpaceX launched the latest test of its mega rocket Starship on Tuesday night and completed the first-ever deployment of a test payload — eight dummy satellites — into space. After just over an hour coasting through space, Starship splashed down as planned in the Indian Ocean.

SpaceX’s Starship rocket launched to space and deployed satellites for the first time before surviving most of its journey to Earth, achieving new technological milestones after a year of fiery setbacks.