The phrase "astronaut thing" is correct and usable in written English.
It can be used informally to refer to something related to astronauts or space exploration, often in a casual or humorous context.
Example: "I always wanted to do the astronaut thing, but I never thought I'd actually get the chance to go to space."
Alternatives: "space-related activity" or "astronaut-related matter".
Passing an exhibit charting the simultaneous development of Soviet and American space-themed toys in the sixties, Hembrough remembered a call he'd recently received from a childhood friend of Neil Armstrong, who said he had a bunch of the late astronaut's things.
"If NASA is concerned about the health of astronauts, the first thing is to address artificial gravity," Zubrin was quoted as saying.
You say you're an astronaut and the first thing someone wants to know is how an astronaut goes to the bathroom.
And with the simulcast on jumbo video screens, a countdown clock and astronaut appearances, the whole thing has a campy vibe reminiscent of New Year's Eve in Times Square.
If there's one thing an astronaut probably doesn't need explained to them, it's physics.
Also point out that leaving Earth at near the speed of light makes time do the same thing––the astronaut goes near light speed, eating a sandwich, and the entire Earth, Sun, Cosmos, fade away and lose energy, getting dark.
It's the sort of thing aspiring astronauts might do.
What goes through an astronaut's head when things go wrong, and he is floating in space 350 miles above the Earth?
Most collectors of space memorabilia buy things like astronaut autographs, mission patches and "flown" goods — objects that have made the trip to space and back, and which then make their way to auctions, swap meets and collector Web sites.
The 10-year-old loves rockets and worships Thomas P. Stafford, the astronaut who, among other things, orbited the Moon in 1969 and in 1975 was the American commander of the Apollo-Soyuz flight, the first joint United States-Soviet space mission.
