German-born English astronomer. He was a skilled telescope maker, and
pioneered the study of binary stars and nebulae. He discovered the planet
Uranus 1781 and infrared solar rays 1801. He catalogued over 800 double
stars, and found over 2,500 nebulae, catalogued by his sister Caroline
Herschel; this work was continued by his son John Herschel. By studying
the distribution of stars, William established the basic form of our
Galaxy, the Milky Way.
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