@stingray I don’t think I ever learnt one for planets, and am giggling at your typo, but for geological eras there’s one that goes, iirc:Pregnant camels often sit down carefully. Perhaps their joints creak. Easing oil might prevent pain.
The post about Pluto earlier reminded me of the pneumonic I learned about the order of planets. Did you guys have one?Mine, inherited from my sister, was "Molly vomits every Monday just so unicorns never puke."