My friend told me that Pluto wasn't considered a planet.
He must think I'm stupid or something,
Everyone knows he's a dog.
"It's a small world." said the Alien.
When he bumped into his old friend on Pluto.
As the space probe is nearing the end of its journey, one scientist is heard shouting, "What do you mean that isn't Pluto?!"
My friend was reading a science journal about the Solar System today.
Confused, he said to me "I thought Pluto was a planet? It isn't listed as one here, why's that?"
I think it's pretty self ex-planetary.
When scientists decided to down-grade Pluto from a 'planet' to a 'dwarf planet' in 2006 , I had to relearn everything I knew about Pluto.
Fortunately, the only thing I knew about Pluto was that it was a planet.