another bit of astronomical trivia, this time word-related:

Which of the major bodies in the (our) solar system have names that are not taken from classical greek or roman mythology? (I say "major bodies" to exclude asteroids -- which are so numerous that we've long since abandoned classical names -- and comets. Let's take "major" to mean larger than the largest asteroid, Ceres.)

The obvious answers are "earth; moon; sun". There are at least two others.