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How far can a telescope see?

发布时间:2018-12-20 09:51:14 作者:Jiaxing Rui Xing Optical Instrument Co., Ltd

People who are new to telescopes often wonder, "how far can this telescope see?" "And" how much larger can this telescope be? "And" how big can this telescope hold the stars in the sky? Etc.
How far can a telescope see?
The parameter used to indicate the telescope is not the distance, but the magnification, that is, how much closer the observed target is. For example, using a 10-fold telescope to observe an object 100 meters away is equivalent to viewing it at 10 meters. Is magnification the first thing to consider when buying a telescope? Absolutely not! The magnification of the telescope is limited. Due to the glass manufacturing process, optical quality and other factors, the effective magnification of the telescope is equal to the diameter of the telescope mm X2. It is meaningless to exceed the magnification of this formula.
In fact, "how far you can see" depends entirely on the brightness of the object being observed. As long as the object is bright enough, you can see infinity without a telescope. More than 99.9% of the stars we see are stars, and stars are so far away from us that even with the largest telescope on earth, they are still just geometric highlights. On the contrary, if a star has a visible surface or even a color in the telescope, it can be concluded that its optical system has a defect), only those objects in the solar system (such as the sun, planets, comets, etc.) or objects with a visible surface outside the solar system (such as nebulae, galaxies, clusters, etc.) can be amplified with the help of the telescope.