it's astronaut; we'd really like to avoid the implications of "astronaught." see . . . er, I can't remember which thread but it's in conspiracies somewhere, for lots of discussion on the subject.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"