Newtonian telescope
n
(Astronomy) a type of astronomical reflecting telescope in which light is reflected from a large concave mirror, onto a plane mirror, and through a hole in the side of the body of the telescope to form an image
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| Noun | 1. |  Newtonian telescope - reflecting telescope in which the image is viewed through an eyepiece perpendicular to main axisreflecting telescope, reflector - optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece; "Isaac Newton invented the reflecting telescope in 1668" |
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