William Herschel(1738-1822)
Frederick William Herschel KH, FRS (German: Friedrich Wilhelm Herschel; 15 November 1738 - 25 August 1822) was a German-born British astronomer and composer. He frequently collaborated with his younger sister and fellow astronomer Caroline Herschel (1750-1848). Born in the Electorate of Hanover, William Herschel followed his father into the military band of Hanover, before emigrating to Great Britain in 1757 at the age of nineteen.