Abraham Sharp (1651–1742) was a schoolmaster of Liverpool, and subsequent bookkeeper in London, whose wide knowledge of mathematics, astronomy, etc., attracted John Flamsteed, by whom he was invited in 1688 to enter the Greenwich Royal Observatory, where he did notable work, improving instruments, and showing great skill as a calculator; published "Geometry Improved," logarithmic tables, etc. // Events January 1 - Charles II crowned King of Scotland in Scone. ... // Events January 24 - Charles VII Albert becomes Holy Roman Emperor. ... Liverpool waterfront by night, as seen from the Wirral. ... London is the capital city of the United Kingdom and of England and is the most populous city in the European Union. ... Euclid, detail from The School of Athens by Raphael. ... Radio telescopes are among many different tools used by astronomers Astronomy (Greek: αστÏονομία = άστÏον + νόμος, astronomia = astron + nomos, literally, law of the stars) is the science of celestial objects and phenomena that originate outside the Earths atmosphere, such as stars, planets, comets, auroras, galaxies, and the cosmic background radiation. ... John Flamsteed - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... // Events A high-powered conspiracy of notables, the Immortal Seven, invite William and Mary to depose James II of England. ... Royal Observatory, Greenwich Royal Observatory, Greenwich Former Royal Greenwich Observatory, Herstmonceux East Sussex one of the hyper-accurate chronometers at the observatory. ...
The Sharp crater on the Moon is named after him. Sharp is a lunar impact crater located to the west of the Sinus Iridum bay of the Mare Imbrium, beyond the Montes Jura range. ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ...
Then it was seen that graduation was an art which required special talents and training, and the best artists gave great attention to the perfecting of astronomical instruments.
Of these may be named AbrahamSharp (1651-1742), John Bird (1709-1776), John Smeaton (1724-1792), Jesse Ramsden (1735-1800), John Troughton, Edward Troughton (1753-1835), William Simms (1793-1860) and Andrew Ross.
The first graduated instrument must have been done by the hand and eye alone, whether it was in the form of a straightedge with equal divisions, or a screw or a divided plate; but, once in the possession of one such divided instrument, it was a comparatively easy matter to employ it as a standard.
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