So, there's been a debate over whether or not Pluto is indeed a planet. Well, it's been settled; not only is it a planet according to the International Astronomic Union, but a particular type of planet known as a Plutonic Planet.
The solar system (huh, I wonder if that's a proper name like The Sun and The Moon… I'll worry about it later) now consists of:
Mercury
Venus
Earth
Mars
Ceres (a dwarf planet)
Jupiter
Saturn
Uranus
Neptune
Pluton/Charon (now a binary planet)
UB313 (commonly known as Xena if I'm not mistaken)
Adjust all mnemonic devices accordingly.