Additionally , since the inside will be weightless , there must be a way for the astronauts to stay in their seats during the flight .
It also must have a way that the astronauts would not be knocked around during launch or reentry .
Since the inside will be weightless , there must be a way for the astronauts to stay in their seats during the flight .
It also must have a way that the astronauts would not be knocked around during launch or reentry .