2. Why did the astronomer get so cross when he saw Uranus through the telescope? Because it was in a retrograde motion.
3. What did Uranus say to Neptune? Go away, you're being too Neptune-y.
4. Why did the alien abductee ask to be returned to Uranus? Because it was out of this world.
5. What did the astronomers say when they saw a red spot on Uranus? They shouted "Man down!"