"Hey, Bob?"
"Yeah?"
"That planet we're supposed to be going to - wasn't it supposed to have... I dunno, water and stuff?"
"Yeah, so?"
"Well, we're headed towards a barren rock with no atmosphere... that can't be right, can it?"
"You go to the navigation coordinates they set."
"But..."
"The brass says we head to THIS rock, then we're headed to THIS rock. They know better than you."