Impact Craters (Let's Talk Science)
Shaping the Planets - Impact Cratering (Lunar and Planetary Institute)
Crater - The Columbia Encyclopedia (Source Reference - Infobase)
Craters (Science Online - Infobase)
Impact Crater Structures (Science Online - Infobase)
The Impact Cratering Process (Britannica)
Mars Surface Scared by 635,000 Big Impact Craters (Science.com)
CRATER: Is a large, bowl-shaped cavity in the ground or on the surface of a planet or the moon, typically one caused by an explosion or the impact of a meteorite or other celestial body.
METEORITE CRATER: Is a depression that results from the impact of a natural object from interplanetary space with Earth or with other comparatively large solid bodies such as the Moon, other planets and their satellites, or larger asteroids and comets.
IMPACT CRATER: An impact crater is formed when an object like an asteroid or meteorite crashes into the surface of a larger solid object like a planet or a moon.