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By Colin Rosemont. For premium support please call: 800-290-4726 more ways to reach us
Positioning an optical telescope in space eliminates the distortions and limitations that hamper that ground-based optical telescopes (see Astronomical seeing), providing higher resolution images. Optical telescopes are used to look at planets, stars, galaxies, planetary nebulae and protoplanetary disks, amongst many other things. [150]
There are three main types of telescopes used in visible-light astronomy: Refracting telescopes, which use lenses to form the image. Commonly used by amateur astronomers, especially for viewing brighter objects such as the Moon, and planets, due to lower cost and ease of usage. Reflecting telescopes, which use mirrors to form the image ...
Blinking Galaxy: Serpens: Its difficulty of viewing in a small telescope and tendency to go in and out of view. [citation needed] Bode's Galaxy: Ursa Major: Named for Johann Elert Bode who discovered this galaxy in 1774. [citation needed] Also known as Messier 81. The largest galaxy in the M81 Group.
Largest does not always equate to being the best telescopes, and overall light gathering power of the optical system can be a poor measure of a telescope's performance. Space-based telescopes , such as the Hubble Space Telescope , take advantage of being above the Earth's atmosphere to reach higher resolution and greater light gathering through ...
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