In August 1609, the Italian scientist Galileo Galilei dogodalsya optic lens tube, which have long been used by Dutch sailors to draw the lens up to the starry night sky. So came the first telescope. A telescope, - we give here the definition is an instrument designed for observation of distant celestial bodies - comets, stars, planets, moon, Sun.

During its four centuries the history of telescopes was greatly changed. The first telescopes, which is now part of history, were extremely bulky and give a blurred image. Many scientists struggled to improve indispensable for astronomers device. To the development of new models of telescopes had a hand Sam Newton, the famous physicist. You need to call the names of the Frenchman Cassegrain, offered a new two-mirror system telescope and Y. V. Bruce, the developer of metal mirrors for telescopes. His design of a telescope proposed and M. V. Lomonosov. Exactly the same level structures, regardless of Clematis has developed and offered Herschel.
The scientists were not in vain. Already in the 18th century a small convenient telescopes replaced their bulky ancestors. Finally, in the 19th century a real revolution in the design of telescopes has made the Amateur astronomer Crossley equipped with the device aluminum mirror. Increased in size, Crossley telescopes are used in observatories.

All existing telescopes are divided into two large groups: the mirror (reflectors) and lenses (refractory).
Built according to the scheme of Newton's reflecting telescopes are simple and low cost and therefore more common. However, they have many shortcomings. For example, the larger the diameter of the mirror reflector, the longer the pipe. Thus, the most powerful reflecting telescope will be the most overall. It should be noted that the image of the given reflector, relatively strongly distorted. Since one end of the tube reflecting telescope is open, the device quickly clog.
Lens telescopes - refractor telescopes - not as economical as reflectors, win compared to them in many ways. Represents a closed tube with a lens on the entrance lens of the telescope is protected from penetration of dust. Image quality refractor, again, surpasses the reflecting telescope.

All telescopes, regardless of type, have included a tripod. They include, as a rule, and the optical viewfinder. But if You want to watch the sun, don't forget to install on your telescope filters, which are also included.

"RONBO.RU" Moscow
2007