Newtonian telescope - Hutchinson encyclopedia article about Newtonian telescope

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Newtonian telescope

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Newtonian telescope

In astronomy, simple reflecting telescope in which light collected by a parabolic primary mirror is directed to a focus at the side of the tube by a flat secondary mirror placed at 45 degrees to the optical axis. It is named after English physicist and mathematician Isaac Newton, who constructed such a telescope in 1668.

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