The telescope is an astronomical an optical instrument designed to observe celestial bodies. According to its optical system is divided into mirror telescopes (reflectors), lens (refractors) and catadioptric telescopes. Telescopes are used for visual, photographic, spectral, photoelectric observations with the use of photographic, television, electro-optical and other radiation detectors. Opportunities of astronomy were significantly limited, without the use of these devices. Structurally, the telescope is a tube (solid, framed or truss), established and equipped with axes for aiming the telescope at the object tracking and tracing them. You can watch the stars and other space qualifications of intentions with a telescope. By the nature of the use of telescopes are divided into astrophysics for the study of stars, planets, nebulae, sun, astrometric, and satellite cameras for observation of artificial earth satellites, meteor patrols for meteor observations, telescopes for observations of comets, etc. Earth's atmosphere is well transmits radiation in the optical (0,3-0,6 m), near infrared (0.6 - 2 microns) and radio (1 mm - 30 m). Already in the near-ultraviolet wavelength decreases the transparency of the atmosphere becomes much worse, resulting in observations in the ultraviolet, X-ray and gamma bands are possible only from space. An exception is the gamma-radiation of ultrahigh energies, for which suitable methods for cosmic ray astrophysics: the high-energy gamma-ray photons in the atmosphere produce secondary electrons. In some cases we can solve the problem of rising atmospheric telescopes and detectors in the air on planes or stratospheric balloons. But the greatest results are achieved with the removal of telescopes in space. Space astronomy is the only way to get information about the universe in the short and, for the most part, in the infrared range, a way to greatly improve the resolution of radio interferometers. So, special space stations were created. Optical observations from space is not so attractive in the light of modern development of adaptive optics, which allows a strongly reduce the influence of atmosphere on the image quality and high cost of launch into orbit a telescope with a mirror, which is comparable in size to the large ground-based telescopes. However, such telescopes can more closely monitor the sun and other planets. Catadioptric telescope is an optical instrument in which the image is constructed sophisticated lens that contains both mirrors and lenses. Corrective lenses of a relatively small diameter are used in all modern reflectors to increase the useful field of view. Catadioptric telescope is an optical instrument which is often used on oso.