I have some questions: Why is Callisto smaller than Io? Why is Tethys so small? Why is Hyperion so big? Why is Enceladus and Mimas bigger than Dione? Why is Phobos and Deimos bigger than Marianda? Why is Titan and Ganymede smaller than Mercury? Where are Neptunes moons other than Triton? Why is Umbriel bigger than Titania and Oberon? Why is Makemake bigger than Eris? Why is Haumea bigger than Pluto? Why is Pluto bigger than Triton? Why is Enceladus bigger than Callisto? Why is Charon smaller than Ceres? Why is Saturn smaller than he is supposed to be? Why is Ariel bigger than Europa?
