|MadSci Network: Astronomy|
Of course. The electromagnetic spectrum covers radiation of every frequency from radio to gamma rays. Visible light (from red to blue) is one form of electromagnetic radiation. Radio waves are another. The Earth produces IR radiation mostly, but also a little bit of visible (forest fires, city lights beside the reflected light from the Sun, which makes it visible from space), and of course radio waves from TV and radio stations. Molecules and atoms in the atmosphere produce radiation in the microwave, optical and ultraviolet frequencies. Electrons and other fast particles hitting the atmosphere also produce radiation in the ultraviolet and visible in the form or auroras near the poles. Thunderstorms not only produce radiation at almost every frequency, but also gamma rays as was recently discovered. Vladimir Escalante Ramirez [Moderator's note: In addition to all the sources listed above, the earth itself produces small amounts of radiation at every wavelength. But the "peak" is in the infrared; the sources listed above will actually dominate at all other wavelengths.]
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