When they're not in space, NASA astronauts fly around the world in style.
Not only does the US Air Force and nearly every branch of the military have Gulfstreams in their fleet but NASA also sports the luxury business jets, used for a wide array of missions that includes flying astronauts to launch sites.
The space agency uses its fleet of aircraft, including the Gulfstreams, primarily for scientific research under the NASA Airborne Science Program
Take a closer look at the NASA Gulfstream fleet.
Read More: The US military has a fleet of modified Boeing and Gulfstream VIP private jets — here's what they do