What is a lightyear?
The same as a regular year, but with less calories.
What's E.T. short for?
Because he's got little legs.
Have you heard the one about the spaceship that came to Earth?
Never mind its over your head.
How do you get a baby alien to sleep?
Rocket.
What do you call an alien spaceship that goes from planet to planet to planet? A UF-hoe.
How did the aliens hurt the farmer?
They trod on his corn.
What will you do if you come across a green alien? I’ll simply wait until it’s ripe.
What do you call an alien spaceship that's leaking water?
A crying saucer.
Why don't aliens get hungry after being blasted into space?
Because they've just had a big launch.
Where do aliens park their flying saucers?
At a parking meteor.
What do aliens prefer to drink?
Gravi-tea.
What do you call an alien with three eyes?
An aliiien.
How will you save yourself if you come across an aggressive alien? Give him some space.
What time do spacemen get up? Alien in the morning.
How do you organise a welcome party for an alien race?
You planet.
What do you call a wizard aboard a spacecraft?
A flying sorcerer.
What do you call an overweight alien?
An extra cholesterol.
Have you heard the one about the spaceship that came to Earth?
Never mind its over your head.