In 1609, the Italy astronomer Galileo invented the history of the first astronomical telescope, which opened a prelude to the human to recognize astronomy by using telescope. Astronomical telescope is an essential tool for astronomical research in modern astronomy, it can lead people to detect cosmic, interpret the unknown, and have made great contribution for human civilization. For the general astronomy enthusiasts, if you want to observe the celestial bodies, in addition to the astronomical telescopes, you have to be equipped with equatorial instrument and support bracket. Equator is used to overcome the the influence of earth's rotation when people observing the celestial bodies, and the support is used for keeping the telescope fixed, and preventing the tilt of the astronomical telescope.

 

Generally speaking, whether the astronomical telescope can observe the farther and darker object or not is depending on its own light-collecting ability, the light-collecting ability is more better, the astronomical telescope will see farther and more clear. But such kind of astronomical telescope with well light-collecting ability generally have large caliber, this also means that the balance will become worse during observation process, so as to affect the observed effect. Therefore, it is necessary for the astronomical telescope to add tungsten alloy counterweight. The purpose of adding tungsten alloy counterweight is that the tungsten alloy has excellent wear resistance, corrosion resistance and high density, which can reach the ideal weight requirements with small volume.