Yes, There Are Only 8 Planets Instead of 9 Because There Used To Be Just 5.

Photo:Rhett Allain. Jupiter and Saturn in the sky.

Some people were super upset when it was decided that Pluto should not be called a planet. I mean, countless students had grown up memorizing the following sentence:

My Very Excellent Mother Just Served Us Nine Pizzas.

Of course, this is a mnemonic to help us remember the VERY IMPORTANT order of the planets in…