Description of Telescopes
Telescopes are one of the main ways that astronomers explore the universe. They come in all shapes and sizes depending on their function. Generally, bigger telescopes are better if you want to see faint, far-away things, because they can gather more light and have better resolution. Resolution is the ability of a telescope to discern objects close together; for example, the ability to clearly separate two stars that are very close together or the ability to see smaller craters on the Moon.The gamma rays are the most powerful type of radiation, discovered at the beginning of the century as radioactive substance emissions. Like the light, the gamma rays are constituted by photons, "particles of light", with the difference that a gamma photon has more than a million, even thousands of million of times more energy that a photon of visible light. By their high energy these photons penetrate lead plates, and to generate them in the Earth we required subatomic particle accelerators: once accelerated, these particles can produce gamma rays when hitting other particles that serve as target. In analogous form, the celestial gamma ray sources must accelerate subatomic particles and make them affec
Based on the investigation that I made, I think that the best telescope option that I can buy is the Newtonian, because is the cheapest of these four, is easy to operate, and offers a clear image of the objects that I will look. The refractor telescopes are excellent for lunar, planetary and binary star observing especially in larger apertures. With infrared telescopes, scientists have information that optical telescopes are incapable of giving. Incoming light enters through a thin aspheric Schmmidt correcting lens, then strikes the spherical primary mirror and is reflected back up the tube. Thay are excellent for deep sky observing or astrophotography with fast films or CCD's, very good for lunar, planetary and binary star observing or photography, and excellent for terrestrial viewing or photography. They are also sensitive to cool and lukewarm materials, such as, dust and gas clouds with a width of hundreds of light-years across. In radio astronomy, however, mostly reflecting telescopes are used. Also, they are good for distant terrestrial viewing. In any case, the gamma radiation emission obeys to different processes that are require to emit visible light. Infrared is capable of traveling through interstellar dust in a straight line, but only cooler stars, which are around 3,000 degrees Centigrade gives off infrared. Optical and infrared telescopes have similar features, but an infrared needs a cooling system. The convex secondary mirror multiplies the effective focal length of the primary by a factor of six, resulting in an overall f/15 system at the Cassegrain focus. Cryogenically cooled solid-state amplifiers with very low internal noise are used to obtain the best possible sensitivity and minimize the noise, which could otherwise mask the signal from the source. They yield an actual field in excess of 1.
Common topics in this essay:
Infrared Infrared,
Schmidt-Cassegrain Newtonians,
Gamma Rays,
X-Rays Studies,
Visible Light,
Ultraviolet Ultraviolet,
,
gamma rays,
degrees centigrade,
primary mirror,
lunar planetary,
optical telescopes,
secondary mirror,
visible light,
deep sky,
radio telescope,
gas clouds,
deep sky objects,
planetary binary star,
faint deep sky,
binary star observing,
stars 3000 degrees,
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