All you clever wordsmiths: check out this contest: create a new planetary mnemonic for our expanding universe -- well, uh, solar system. The prize, apparently, is galactic recognition.
Check out the comments section for link above for already submitted suggestions.
This article, explains the sequence (MVEMCJSUNPCX). If you're too lazy or pressed for time to follow the link, 'C', 'X', and 'C' stand for Ceres, the largest asteroid, the body dubbed Xena, Charon (once considered Pluto's moon). I am surprised that as of this morning, nobody has suggested an alternate spelling for xenophile, xenophobia, etc. Wouldn't Xenaphile be more appropriate, because, yes, Xena is named after the goddess with her own television program. Why stick with those old myths?