page_title: Equatorial mount
section_title: Horseshoe mount
hierarchical_section_title: Equatorial mount / Astronomical telescope mounts / Horseshoe mount
caption_attribution_description: English: The 200 inch telescope on Mount Palomar. CREDIT: NASA SOURCE: http://lifesci3.arc.nasa.gov/SpaceSettlement/scenarios/images.jpg COPYRIGHT: “NASA images generally are not copyrighted. You may use NASA imagery, video and audio material for educational or informational purposes, including photo collections, textbooks, public exhibits and Internet Web pages.” PREPARED BY Adrian Pingstone in December 2003. Polski: 508cm teleskop w Obserwatorium na Mount Palomar. ORYGINALNY OPIS: CREDIT: NASA SOURCE: http://lifesci3.arc.nasa.gov/SpaceSettlement/scenarios/images.jpg COPYRIGHT: “NASA images generally are not copyrighted. You may use NASA imagery, video and audio material for educational or informational purposes, including photo collections, textbooks, public exhibits and Internet Web pages.” PREPARED BY Adrian Pingstone in December 2003.
context_page_description: An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescopes and cameras. The advantage of an equatorial mount lies in its ability to allow the instrument attached to it to stay fixed on any celestial object with diurnal motion by driving one axis at a constant speed. Such an arrangement is called a sidereal or clock drive.
context_section_description: The Horseshoe mount overcomes the design disadvantage of English or Yoke  mounts by replacing the polar bearing with an open "horseshoe" structure to allow the telescope to access Polaris and stars near it. The Hale telescope is the most prominent example of a Horseshoe mount in use.
caption: Horseshoe mount on the Hale telescope
exif: {}