Why was the thirsty alien hanging around the computer?

He was looking for the space bar!

Paddy the Earthling: We put a man on the moon in 1969.

Paddy the Martian: Big deal! We're going to send a team to the Sun.

Paddy the Earthling: You're mad! They'll be burned up before they even get close.

Paddy the Martian: We're not that stupid! We're sending them up at night!

What makes you think Marie Griffin is an alien?

She has three 'i's.

Student: Please Sir! Did you hear that scientists have found life on another planet?

Teacher: What are you talking about?

Student: They found fleas on Pluto!

Q: Did you ever taste the sun?

A: No, but I've heard it's outta this world!

Cool Teenage Martian: I was at a party on Mercury last night.

His Friend: Was it any good?

Cool Teenage Martian: No! It was really boring.

His Friend: How come?

Cool Teenage Martian: There was no atmosphere.

Did you hear about the astronaut who stepped on chewing gum?

He got stuck in Orbit!

Jupiter came down to Earth one day and decided to help these two

criminals to rob a bank. Anyway, to make a long story short,

they got caught and the three of them found themselves in court.

The judge sentenced the two earthlings to fifteen years, and Jupiter

was a bit shocked when he was sentenced to ten years.

"But your honour" said Jupiter, "I didn't even take part in the robbery!"

"Yes" said the judge. "But you helped them ... Planet!".