What Is a Telescope Made of?


A telescope is made of two major parts; the optical system and the hardware that holds this system in place. The optical system is made of lenses and mirrors, while the hardware is mostly made of steel and some alloys of zinc.
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The only important parts are the lenses, which are made of high-quality glass. (The lenses for cheap telescopes are plastic, which causes a lot of distortion. ) Then there are parts
n 1609, while still a professor of mathematics at the University of Padua in Italy, Galileo Galilei constructed a refracting telescope, which bends light like a magnifying glass.
A reflecting telescope uses mirrors to reflect an image.
Reflecting telescopes come in one of three designs. In the prime focus, the astronomer sits inside the telescope where the reflected light is focused. The Cassegrain focus uses a
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