The trip back to Earth will take the Ax-3 crew around 13 hours. Marcus will serve as a mission specialist during the journey, sharing the ride with Walter Villadei from Italy, Alper Gezeravcı from Türkiye and Michael López-Alegría, a dual US-Spanish citizen.

After a series of burns to lower its orbit, the spacecraft will enter Earth’s atmosphere and deploy its parachutes for a water-landing. Marcus and crew are expected to splash down off the coast of Florida, USA, on 4 February 2024 at 00:10 GMT/01:10 CET. This will mark the end of Marcus’s mission, called Muninn.