Slipher, Earl Carl
BornNear Mulberry, Indiana, USA, 25 March 1883
DiedFlagstaff, Arizona, USA, 7 August 1964
American optical astronomer Earl Slipher obtained large numbers of photographs of the planets that were used to demonstrate changes in the patterns and colors of Martian clouds and changes in the rotation period of the Great Red Spot on Jupiter (meaning that it could not be anchored to a solid surface below).
Slipher was the son of David Clark and Hannah App Slipher and the younger brother of astronomer Vesto Slipher. He earned B.A. (1906) and M.A. (1908) degrees from the University of Indiana and received honorary degrees from the University of Arizona and Northern Arizona State University. Slipher married Elizabeth Tidwell in June 1919; they had one daughter, Capella, and one son, Earl, Jr.
Slipher began his astronomical career by accompanying his astronomy professor at Indiana, John Miller, on a solar eclipse expedition to Spain in 1905. Slipher participated in four other eclipse...