Answer:
Out of all the celestial bodies, this one has the funniest name
There is a kind of fish that can never swim. What is that?
Why didnโt the skeleton cross the road?
It's held in the hand when going out.
What two keys canโt open any doors?
Iโm hard as a rock and as light as a feather. Iโm passed on to one another. Poor people need me and rich people have me.