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Picture of a Perseid meteor from 1993. The colors are representative but digitally enhanced. As the meteor streaked across the night sky, different excited atoms emitted different colors of light. The origin of the green tinge visible at the right is currently unknown, however, and might result from oxygen in Earth’s atmosphere.

(c) AlltheSky.com. Credit & Copyright: S. Kohle & B. Koch, Bonn University

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