Facts About Telescope
Telescope allow us to see further; they are able to collect and focus more light from distant objects than our eyes can alone. This is achieved by refracting or reflecting the light using lenses or mirrors. Refractive telescopes contain lenses much like those found in our own eyes only much larger. Inside the telescope, light first reaches a primary lens.
Facts about Telescope:
Telescopes not only help magnify far away objects but they also allows humans to see parts of the light spectrum beyond visible light, including gamma rays, x-rays, ultraviolet rays, infrared rays, microwaves and radio waves.
Galileo did not invent the telescope, he was, however the first to methodically use it to peer into the night sky. Dutch eyeglass maker Hans Lippershey (1570-1619) actually invented the optical telescope in 1608.
Telescopes perform three main functions:- Light gathering, resolving and magnifying.
The single most important factor in determining how well a telescope will perform is aperture or the diameter of a telescope’s lens or mirror. Its aperture determines the brightness and sharpness of its images.
The world’s most expensive telescope is the Hubble Space Telescope (HST) at $2.1 billion. Its replacement, the Webb telescope, due to launch in 2018, is estimated to cost $8.3 billion.
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