Why does the Moon go to the bank? To change his quarters.
Why did the cow go up in the spaceship? To see the Mooooooooooon.
Why didn't people like the restaurant on the Moon? Because there was no atmosphere.
Where does an astronaut park his car? At a parking meteor.
What do planets like to read? Comet books.

What hot drink do aliens enjoy? gravi-tea.
An astronaut wrote about flying to the moon twice. It was double-spaced.
Have you heard of the chef in the space station? He not much of an astronaut, but his food is out of this world.