NASA has regained contact with Artemis 2 after a 40-minute blackout with ground control when the spacecraft went behind the Moon, blocking radio signals with the ground.

The four-person crew, including mission commander Reid Wiseman, pilot Victor Glover, and mission specialists Christina Koch of NASA and Jeremy Hansen of the Canadian Space Agency, are now on their way back to Earth.

In just three days, they will face another big test – reentering the Earth’s atmosphere at a blistering 25,000 miles per hour, hitting at such as speed that he heat shield which protects them will be a scorching 5,000 degrees for several minutes, during which they will again be out of radio contact with the ground.

Artemis 1, the first test flight of the program, though unmanned, experienced abnormalities with the heat shield on that mission.

NASA is confident that it has corrected the problem and that the heat shield will perform better this time around.