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- Liquid_mirror_telescope abstract "Liquid mirror telescopes are telescopes with mirrors made with a reflective liquid. The most common liquid used is mercury, but other liquids will work as well (for example, low melting alloys of gallium). The container for the liquid is rotating so that the liquid assumes a paraboloidal shape. A paraboloidal shape is precisely the shape needed for the primary mirror of a telescope. The rotating liquid assumes the paraboloidal shape regardless of the container's shape. To reduce the amount of liquid metal needed, and thus weight, a rotating mercury mirror uses a container that is as close to the necessary parabolic shape as possible. Liquid mirrors can be a low cost alternative to conventional large telescopes. Compared to a solid glass mirror that must be cast, ground, and polished, a rotating liquid metal mirror is much less expensive to manufacture.Isaac Newton noted that the free surface of a rotating liquid forms a circular paraboloid and can therefore be used as a telescope, but he could not actually build one because he had no way to stabilize the speed of rotation[citation needed] (the electric motor did not exist yet). The concept was further developed by Ernesto Capocci of the Naples Observatory (1850), but it was not until 1872 that Henry Skey of Dunedin, New Zealand constructed the first working laboratory liquid mirror telescope.Another difficulty is that a telescope with a liquid metal mirror can only be used in zenith telescopes that look straight up at the zenith, so it is not suitable for investigations where the telescope must remain pointing at the same location of space (a possible exception to this rule may exist for a mercury mirror space telescope, where the effect of Earth's gravity is replaced by artificial gravity, perhaps by rotating the telescope on a very long tether, or propelling it gently forward with rockets). Only a telescope located at the North Pole or South Pole would offer a relatively static view of the sky, although the freezing point of mercury and the remoteness of the location would need to be considered. A very large telescope already exists at the South Pole, but the North Pole is located in the Arctic Ocean.Currently, the mercury mirror of the Large Zenith Telescope in Canada is the largest liquid metal mirror in operation. It has a diameter of six meters, and rotates at a rate of about 8.5 revolutions per minute.".
- Liquid_mirror_telescope thumbnail Liquid_Mirror_Telescope.jpg?width=300.
- Liquid_mirror_telescope wikiPageExternalLink liquid-mirror-telescopes-history.pdf.
- Liquid_mirror_telescope wikiPageExternalLink gallium.php.
- Liquid_mirror_telescope wikiPageExternalLink LMT.
- Liquid_mirror_telescope wikiPageExternalLink 1.
- Liquid_mirror_telescope wikiPageExternalLink lzt.
- Liquid_mirror_telescope wikiPageExternalLink index.html.
- Liquid_mirror_telescope wikiPageExternalLink displayStory.cfm?Story_ID=432060.
- Liquid_mirror_telescope wikiPageID "3299797".
- Liquid_mirror_telescope wikiPageRevisionID "575298411".
- Liquid_mirror_telescope hasPhotoCollection Liquid_mirror_telescope.
- Liquid_mirror_telescope subject Category:Liquid_mirror_telescopes.
- Liquid_mirror_telescope subject Category:Mirrors.
- Liquid_mirror_telescope subject Category:Optical_devices.
- Liquid_mirror_telescope subject Category:Telescope_types.
- Liquid_mirror_telescope subject Category:Telescopes.
- Liquid_mirror_telescope comment "Liquid mirror telescopes are telescopes with mirrors made with a reflective liquid. The most common liquid used is mercury, but other liquids will work as well (for example, low melting alloys of gallium). The container for the liquid is rotating so that the liquid assumes a paraboloidal shape. A paraboloidal shape is precisely the shape needed for the primary mirror of a telescope. The rotating liquid assumes the paraboloidal shape regardless of the container's shape.".
- Liquid_mirror_telescope label "Espejo líquido".
- Liquid_mirror_telescope label "Flüssiger Spiegel".
- Liquid_mirror_telescope label "Liquid mirror telescope".
- Liquid_mirror_telescope label "Télescope à miroir liquide".
- Liquid_mirror_telescope label "Vloeibaarmetaalspiegel".
- Liquid_mirror_telescope label "液体镜面望远镜".
- Liquid_mirror_telescope sameAs Flüssiger_Spiegel.
- Liquid_mirror_telescope sameAs Espejo_líquido.
- Liquid_mirror_telescope sameAs Télescope_à_miroir_liquide.
- Liquid_mirror_telescope sameAs Vloeibaarmetaalspiegel.
- Liquid_mirror_telescope sameAs m.0945bs.
- Liquid_mirror_telescope sameAs Q1434934.
- Liquid_mirror_telescope sameAs Q1434934.
- Liquid_mirror_telescope wasDerivedFrom Liquid_mirror_telescope?oldid=575298411.
- Liquid_mirror_telescope depiction Liquid_Mirror_Telescope.jpg.
- Liquid_mirror_telescope isPrimaryTopicOf Liquid_mirror_telescope.
