William Hussey

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For the English Chief Justice (d.1495), see William Hussey (judge).

William Joseph Hussey (August 10, 1862 – October 28, 1926) was an American astronomer.

He is most famous for the discovery and study of close binary stars. In the period from 1898 to 1899 he reobserved all binaries discovered by Otto Struve, with at least 3 observations of each. His amazing efficiency is demonstrated by these numbers: He made 1920 observations in one year, with a record of 80 in one night. At the conclusion of his double star work in 1905 he had discovered and measured 1327 close binaries. For this work he was awarded the Lalande Gold Medal in 1906.

A crater in Mars was named in his honor.