Just recently, NASA announced that along with the regular flights to the ISS, it also plans to book a seat in the short-term privatized missions.
The agency issued a pre-solicitation notice confirming the intention to buy a seat in the private missions, asserting that the move will help with furthering its research goals for manned missions to Moon, Mars, and beyond.
This will help NASA keep astronauts healthy in deep space
NASA explained that the data collected from varying lengths of flight, including regular and short-term trips, will help them establish profiles of human physiological, behavioral, and psychological variables of importance.
This will ultimately help them ensure that astronauts headed on planned deep-space missions to Moon and Mars remain healthy and high-functioning throughout their time in space.