John Frederick William Herschel.
Born March 7th 1792.
Birthplace: Slough, Buckinghamshire, England
Died:11-may 1871
Location of death: Collingwood, Kent, England.
Known for creating a mirror of 18 inches diameter and 20 feet focal length for a reflecting telescope in 1820 with the aid of his father. However, this was later improved by his own hand by adding two refractors, of 7 and 5 feet focal length. Herschel is also well known for discovering many moons of Saturn.
Info and photo from:
http://www.nndb.com/people/054/000086793/
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