[P.O.E.]

Me too. I also still use “My Very Efficient Mother Just Served Us Nine Pickles” (includes Pluto), taught to us by our beloved 3rd grade teacher, Mrs. K. back in the day.

[HartleyMBaldwin]

I preferred the planet mnemonic that I learned from Heinlein’s Have Spacesuit Will Travel: Mother Very Thoughtfully Made A Jelly Sandwich Under No Protest. That one has the asteroids in it, even if it does call Earth “Terra”.