Abraham Sharp

Abraham Sharp (1653 – 18 July 1742) was an English mathematician and astronomer.
Life.
Sharp was born in Bradford. He was the son of a well-to-do merchant, and was educated at Bradford Grammar School.
He became a schoolmaster in Liverpool and later a bookkeeper in London. His wide knowledge of mathematics and astronomy attracted Flamsteed's attention. Sharp was invited, in 1688, to enter the Royal Observatory. There he improved instruments and worked as a calculator. He published "Geometry Improved" and logarithm tables.
He returned to Bradford in 1694. The Atlas Coelestis was the largest star map of its time. It had 26 maps of the major constellations visible from Greenwich, and two planispheres designed by Sharp.
The crater Sharp on the Moon is named after him.