Q: What did the male magnet say to the female magnet?
A: From your backside, I thought you were repulsive. However, after seeing you from the front, I find you rather attractive.

There is just one thing I can promise you about the outer-space program: your tax dollar will go farther.

What kind of star wears sunglasses? A movie star.

How did the astronaut serve drinks? In sun-glasses.

Astronomer 1: So, anyway, the cop pulled me over for running the red light. I explained to him that I did not see the light as red, since I was traveling towards it and it was blue-shifted.

Astronomer 2: And he let you go?

Astronomer 1: No, he gave me a speeding ticket instead.