Just a little guy...
Now that Pluto is officially a "dwarf planet", and the number of planets in our solar system down to a paltry eight, it has rightly been observed that a new mnemonic is required. No more may children declare that their very eldery mothers are doing anything that even remotely concerns their pa. The following are my two suggestions so far:
"Murdered Vietnamese Envoy May Justly Startle UN"
"Mexican Viagra Embargo Makes Juan So Unbelievably Numb"
Feel free to add your own suggestions: either here or with Allegorical Nonsense, who first came up with the idea!