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GPS receivers are useful for programming the telescope with its precise location and time, which aids the alignment process required for GoTo. Some motorized telescopes sold during the mid 80s to early 90s, including the Celestron Compustar which used a form of GoTo technology, did not allow for dates after 2000, thus making some Celestron ...
Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror. Schmidt corrector plate: An aspheric-shaped corrector plate used in the Schmidt telescope.
1FGL, 2FGL [4] — Lists of gamma-ray sources from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope; 1RXH — ROSAT HRI Pointed Observations; 1RXS — ROSAT All-Sky Bright Source Catalogue, ROSAT All-Sky Survey Faint Source Catalog; 1SWASP — SuperWASP; 2A — see 1A; 2C — Second Cambridge Catalogue of Radio Sources
Tasco mainly imports telescopes for amateur astronomers but has expanded into other optical products, such as spotting scopes, microscopes, binoculars, telescopic sights, and other rifle accessories. Tasco sells via retail stores , catalogs , and online retailers .
GBT – (telescope) Green Bank Telescope; GC – (catalog) General Catalog, a catalog of clusters, nebulae, and galaxies created by John Herschel and now superseded by the New General Catalogue, also globular cluster; GCAS – (celestial object) Gamma CASsiopeiae, a class of eruptive variable stars named after Gamma Cassiopeiae, the archetype ...
Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses.It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits.
The STARS real-time star tracking software operates on an image from EBEX 2012, a high-altitude balloon-borne cosmology experiment launched from Antarctica on 2012-12-29. A star tracker is an optical device that measures the positions of stars using photocells or a camera. [1]
NGC 2000.0 (also known as the Complete New General Catalog and Index Catalog of Nebulae and Star Clusters) is a 1988 compilation of the NGC and IC made by Roger W. Sinnott, using the J2000.0 coordinates. [17] [18] It incorporates several corrections and errata made by astronomers over the years. [5]