newtonian-telescope | space-encyclopedia

Space Travel

23, May, 2012

Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.

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Term	Definition
Newtonian Telescope	A simple type of reflecting telescope, designed by Isaac Newton 1642-1727, who demonstrated it to the Royal Society in London in 1671. The primary mirror is a paraboloid or spherical for small apertures, and the secondary is a flat mirror positioned in the converging reflected beam at an angle of 45° to the optical axis to form an image just outside the main tube. The design is widely used for small amateur instruments, but is not suitable for large telescopes.

Term

Definition

Newtonian Telescope

A simple type of reflecting telescope, designed by Isaac Newton 1642-1727, who demonstrated it to the Royal Society in London in 1671. The primary mirror is a paraboloid or spherical for small apertures, and the secondary is a flat mirror positioned in the converging reflected beam at an angle of 45° to the optical axis to form an image just outside the main tube. The design is widely used for small amateur instruments, but is not suitable for large telescopes.