transit micrometer

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• Transit instrument — In astronomy, transit instruments are used for the precise observation of star positions. The instruments can be divided into three groups: Meridian instruments for observation of star transits in the exact direction of South or North: * Meridian …   Wikipedia

• Star transit — A Star transit is the passage of a star through the eyepiece of an telescope.The precise observation of star transits is the basis of many methods in Astronomy and in Geodesy. The measurements can be done in different way: # visually (mostly up… …   Wikipedia

• Meridian circle — Groombridge transit circle of 1806 The meridian circle, transit circle, or transit telescope is an instrument for observing the time of stars passing the meridian, at the same time measuring its angular distance from the zenith. The idea of… …   Wikipedia

• Ruggiero Giuseppe Boscovich —     Ruggiero Giuseppe Boscovich     † Catholic Encyclopedia ► Ruggiero Giuseppe Boscovich     A Dalmatian Jesuit and well known mathematician, astronomer, and natural philosopher, b. at Ragusa, 18 May 1711; d. at Milan, 13 February, 1787. He was… …   Catholic encyclopedia

• Richard Towneley — (10 October 1629 – 22 January 1707) was an English mathematician and astronomer from Towneley near Burnley, Lancashire. He was one of a group of seventeenth century astronomers in the north of England, which included Jeremiah Horrocks, William… …   Wikipedia

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• William Gascoigne (scientist) — William Gascoigne (1612 ndash; July 2, 1644) was an English astronomer, mathematician and maker of scientific instruments from Middleton near Leeds who invented the micrometer. He was one of nos Keplari a group of astronomers in the north of… …   Wikipedia

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