Exploring Impact Craters with Google Earth Discipline: EducationBackground The planets in our Solar System are all in roughly circular orbits. Other objects in our Solar System, such as many asteroids and comets are in much more elongated orbits, which means they sometimes end up on collision courses with a planet. All planets in our Solar System are struck from time to time by meteoroids ranging in size from smallTags: earthimpact craterMars Moon
