Why are planets in our solar system the order they are in?

3 days ago ... We all have our ways of remembering the order of the planets. "My Very Educated Mother Just Served Us Nine Pizzas," is a common pneumonic that pre-dates Pluto's demotion to a dwarf planet. In 2007, Astronomy magazine suggested the pluto-less: "My Violent Evil Monster Just Scared Us Nuts". read more

That is to say, the inner planets of our solar system - Mercury, Venus, Earth, and Mars are the 'rocky' planets. They are surrounded by the outer planets - Jupiter, Saturn, Uranus, and Neptune are the gaseous planets. You see, the 'gaseous' planets act like the solar system's"atmosphere". read more

There used to be nine planets. Now there are eight, or maybe nine after all. Whichever you prefer, here is a list of them in the order they appear in the solar system. read more