A new crew is officially on their way to the International Space Station, which means fellow astronauts Butch Wilmore and Suni Williams — who have been in space for 9 months now — are officially one step closer to finally coming home.

The Falcon 9 rocket is carrying four astronauts who will replace Wilmore and Williams, both of whom are veteran NASA astronauts and retired U.S. Navy test pilots and were the first to fly Boeing's faulty Starliner capsule to the ISS in June.