Saturn will rise in the east soon after 9 p.m. Planets: Saturn, Jupiter, Mars and Venus will be easy to see All of this happens about 60 miles above the ground, regardless of how close some meteors may appear. The resulting heat momentarily creates a streak of glowing air that we see as a meteor. As Earth plows through this stream of debris, ranging in size from sand grains to pebbles, each particle slams into our atmosphere at a speed of more than 30 miles per second and burns up almost instantly from friction with air molecules. The meteors are caused by particles released from the comet's nucleus and left behind in space. Most meteor showers happen when Earth crosses the orbit of a comet, and the Perseids come from Comet Swift-Tuttle.
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