NASA have opened their applications on Friday to pay voulenteers to stay at a fake mars in Texas.
The voulenteers will live on a fake marshan surface for 12 months.
It will be taking place at Johnson space station, Houston, Texas.
The volunteers have to be aged 30-35, have good health and don't have motion sickness.
The 4 volunteers will have to go 12 months with limited socialisation with the outside world and limited communication with family and friends, to simulate how a real mission to Mars would be like.
This is part of NASA's plans to make it to the red planet.