What is the movie where they ?!

what is the movie where they are going to mars and there are: a chimp, a girl, a guy, and a funny guy!. I think it is a disney movie!. and when they are in the space ship they are supposed to go to sleep!. but the chimp gets in the funny guys capsule and he couldn't fit in the chimps capsule!. So he stays awake for like 4 or so months!. and he takes the food and paints the ceiling!. (it isn't red planet or mission to mars) And when they get there he realizes he forgot the american flag, so he takes off his underwear and uses it at the american flag!.

I am sorry, I can't remember the name and my boyfriend and I are trying to think of it!. Thanks!!Www@Enter-QA@Com

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