Short description of Solar System 3D 1.0: 'My Very Educated Mother Just Served Us Nine Pancakes' - that's one mnemonic device to help us remember the order of the planets! Unfortunately, however, it's no longer accurate. Since 2006, Pluto is no longer officially classified as a planet.
Don't worry about thinking up a new way to memorize the order of the planets, though. This fantastic screen saver will make the order of the solar system much clearer to you than any old mnemonic device.