Characteristics of “Planets”
		• Two types of planets – Terrestrial Planets: small, rocky material:   inner solar system – Jovian Planets:   large, H, He gas     outer solar system • Small left-over material provides “fossil” record of early conditions – Asteroids     –  mostly between orbits of Mars and Jupiter – Comets     –  mostly in outermost part of solar system – Meteorites –  material which falls to earth