The third launch of China’s heavy-lift Long March 5 rocket successfully delivered its satellite payload to orbit Friday, validating engine design changes after a failure on the Long March 5’s second flight, and clearing the way for the launch of a Chinese Mars rover and lunar sample return mission in 2020.

An automated mini-helicopter driven by two fast-spinning, counter-rotating rotors took off from the surface of Mars, hovered for 30 seconds, then successfully landed Monday to complete the historic first powered flight of an aircraft on another planet.

The rescheduled mission comes following the April 9 scrub due to poor weather and a period on the Eastern Range marked by a noted lack of orbital launches. Liftoff from pad 41 at Cape Canaveral Space Force Station is targeting Monday, April 28, at 7 p.m. EDT (2300 UTC).