> In fact, I argue that such is the definition of faith -- to trust despite not knowing.
I don't think that's such a big difference. Believing in something is trusting it to exist and to have the properties that you think it does. If the astronauts were wrong about the laws of physics, it would have broken their trust and thus their faith.
Hell, just for funsies, to drive the point home:
> belief - Trust, faith, or confidence in someone or something