That's a terrible definition of hard science-fiction both because Han Solo never does that[0] and because it leaves way too much room on the hard side for thing

That's a terrible definition of hard science-fiction both because Han Solo never does that[0] and because it leaves way too much room on the hard side for things like, well, Star Trek, which is pretty soft itself. [0] - Han Solo actually saunters around the inside of a creature whose body contains an atmosphere which inexplicably isn't expelled when the creature has its mouth open; which makes even less sense.