Telescopes

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Telescopes are an arrangement of lenses or mirrors or both that gathers visible light, permitted direct observation or photographic recording of distant objects. A telescope can be used in many ways such as viewing stars, moons, planets, looking at the city from a tall building, or looking at wildlife. All telescopes are not the same, some are better than others. There are three different kind of telescopes. Reflecting which uses two mirrors instead of lenses, Catadioptric (CAT) which combines lens with two mirrors, and Reflectors. In this paper, I will be talking about a refractor telescope and explaining the terms of different terms that describe a telescope in addition special characteristics that makes a telescope a good choice for what you need it for.
Refractors is a type of optical telescope that uses a lens as its objective top form an image. A refractor telescope is made with glass optical elements, like a camera lens. It had a long tube with glass lenses in the front end. They are essentially similar to a big camera lens, but use fewer lens elements. Refractors are high quality and known for their high contrast, excellent imaging ability and relative durability. The may produce views of bright, highly detailed objects (the moon and planets) that are noticeably better than corresponding mirror telescopes. The main advantages of a refractor are that it is easy to uphold, easy to use, and is capable of global observing as well as stargazing. One problem with refracting telescopes is that there is a frequency requirement for refraction, so the amount of refraction at each surface of the lens depends on the wave length. So, different wavelengths focus at slightly different points. It causes objects like stars to be surround...

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...ope, and use the telescope simulator. We have learn there are many different kind of telescope like Refractors, Reflectors, and Catadioptic. Also that there are many different terms that describes a telescope. Using the Simulator, we had to determine which inch of the Aperture, which milometer of the Eyepiece, and the focus Adjustments to get a better picture of the moon/Saturn/cluster. After we get the best picture, at the bottom left hand corner. It show the Light Gathering Power (LGP), Resolution, Magnification, and the field of view. Light Gathering Power is the most important feature. It’s referred to as aperture gain is the ability of a telescope to collect a lot more light that the human eye.

Works Cited

http://www.chuckhawks.com/astronomy_definitions.htm http://www.chuckhawks.com/telescope_basics.htm http://starizona.com/acb/basics/equip_whichisbest.aspx

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