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The telescope is an important astronomical tool that gathers and focuses electromagnetic radiation. Telescopes serve to both increase the angular size and the brightness of objects. When we speak about telescopes we are usually referring to optical telescopes, but many other types of telescopes also exist for other spectrum of electromagnetic radiation. It is unclear as to who it was that actually invented the telescope but Galileo Galilei is credited as being the first to use a telescope for astronomical purposes in 1609.
Most people believe that the only thing a telescope does is magnify images. The problem is that the more you magnify an image the darker and blurrier it will become. For this reason, a telescope must also brighten and clear up an image in order to be useful. Telescopes have three basic functions. The first, and most important function of a telescope, is to gather light. By gathering light a telescope is able to make feint objects brighter and to make......

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Approximate Word Count: 1419
Approximate Pages: 6 (250 words per double-spaced page)

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