An asteroid impact occurs when a space rock, known as an asteroid, collides with a planet, such as Earth. These impacts can vary in size, from small meteoroids that burn up in the atmosphere to large asteroids that can cause significant damage. The energy released during an impact can create craters, trigger earthquakes, and even lead to climate changes. Historically, large asteroid impacts have had profound effects on Earth's environment and life. For example, the Chicxulub impact around 66 million years ago is believed to have contributed to the extinction of the dinosaurs. Scientists study these events to understand their potential risks and to develop strategies for planetary defense.