Only two astronauts will launch on NASA’s upcoming SpaceX Crew-9 mission instead of four to accommodate the two astronauts who arrived at the station aboard Boeing’s (NYSE:BA) Starliner spacecraft, the space agency said on Friday. What Happened: NASA astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov will launch on the SpaceX Crew 9 mission to the International Space Station (ISS) no earlier than Sept. 24 on a four-seat SpaceX Dragon spacecraft. Sunita Williams and Butch Wilmore, who are currently at the station, will join Hague and Gorbunov on their return journey to Earth in Feb…