Meteors
The skies are full of cosmic debris left over from the formation of our solar system. Some of this debris, which may be pieces of rock chipped off asteroids, is referred to as meteoroids. They range in size from tiny specks of dust to rocks weighing many pounds. As meteoroids enter Earth's atmosphere at speeds of about 35,000 miles per hour, they are heated by friction and appear in the sky as glowing streaks by light called meteors or shooting stars. When Earth passes through the dust trail of a comet, a meteor shower may be seen. These showers are fairly predictable because the Earths tends to cut through a comet's stream or tail at regular intervals. Any meteors that reach the Earth's surface are called meteorites. One of the largest was about 150 feet across and formed a creator in Arizona that measures more than half a mile wide and over 570 feet deep. Don't remember it? No wonder, it happened thousands of years ago.
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