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Created page with "== Definition and Origin == A '''meteoroid''' is a small rocky or metallic body in outer space. When a meteoroid, comet, or asteroid enters the Earth's atmosphere at a speed typically in excess of 20 km/s (72,000 km/h; 45,000 mph), aerodynamic heating of that object produces a streak of light, both from the glowing object and the trail of glowing particles that it leaves in its wake. This phenomenon is called a meteor, or colloquially a "shooting star" or "fal..."