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Live broadcasting websites exist for sharing live video astronomy feeds. [4] [5] Video astronomy, combined with remote control of a telescope, allows anyone including disabled people to operate a telescope remotely, or observers in a light-polluted area to operate a telescope in another area, even another country.
Telescopes and other facilities on the summit of Cerro Tololo. The 4.0 m (158 in) Víctor M. Blanco Telescope (Blanco 4m) was completed in 1974 and is very similar to the Nicholas U. Mayall Telescope that was completed at KPNO in 1973. [12] Testing of the telescope and instruments lasted until the beginning of 1976 when science operations began ...
Telescopes can be classified by optical design or mechanical design/construction. Telescopes can also be classified by where they are placed, such as space telescopes . One major determining factor is type of light, or particle being observed including devices referred to as "telescopes" that do not form an image or use optics.
Solar telescopes often have multiple focal lengths, and use a various combination of mirrors such as coelostats, lenses, and tubes for instruments including spectrographs, cameras, or coronagraphs. There are many types of instruments that have been designed to observe Earth's Sun, for example, in the 20th century solar towers were common.
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.
NGC281, popularly the 'Pacman Nebula', imaged from a suburban location using a 130mm amateur telescope and a DSLR camera. Since most people live in urban areas, equipment often needs to be portable so that it can be taken far away from the lights of major cities or towns to avoid urban light pollution. Urban astrophotographers may use special ...