Skip to main content
Like
Create new Glog
previous
next
Email share
16 views | 0 likes | 0 reposts
By: Mike Tsang
The T E L E S C O P E
The telescope was introduced to astronomy in 1609 by the great Italian scientist Galileo Galileio. The first man to see the craters of the moon and sunspots on the sun.He went on discovering the four moons around jupiter and the rings around saturn.
The Newtonian Reflector, also known as catoptrics, is a telescope which uses a spherical or concave parabolic primary mirror to collect, reflect and focus the light onto a flat secondary mirror
The Refractor, also known as the dioptrics, is a telescope that uses lenses to refract, the light that it collects.
Catadioptrics are telescopes that use a combination of mirrors and lenses to fold the light path and direct it for focus and magnification through a hole in the primary mirror.
Thefirst decade of the 1600s with the invention of the optical telescope and its use to study the night sky. Galileo Galilei did not invent the telescope but was the first to use it systematically to observe celestial objects and record his discoveries.The basic tool that Galileo used was a crude refracting telescope. His initial version only magnified 8x but was soon refined to the 20x magnification he used for his It had a convex objective lens and a concave eyepiece in a long tube. The main problem with his telescopes was their very narrow field of view, typically about half the width of the Moon.
