Parents

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Edwin Powell Hubble grad student 1929-1931 Mount Wilson Observatory
 (https://nap.nationalacademies.org/read/5193/chapter/12)
Milton L. Humason grad student 1929-1931 Mount Wilson Observatory
 (https://nap.nationalacademies.org/read/5193/chapter/12)
Fred Lawrence Whipple grad student 1930-1931 UC Berkeley
 (https://nap.nationalacademies.org/read/5193/chapter/12)
William Hammond Wright grad student 1934 UC Berkeley
 (A study of the distribution of extra-galactic nebulae based on plates taken with the Crossley reflector.)
Seth Barnes Nicholson grad student 1928-1934 UC Berkeley
 (https://nap.nationalacademies.org/read/5193/chapter/12)

Children

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Horace Welcome Babcock grad student 1938 UC Berkeley
Albert Gray Mowbray grad student 1943 UC Berkeley
Hyron Spinrad grad student 1961 UC Berkeley
Arnold Noel Argue research scientist 1962- Kitt Peak National Observatory (Physics Tree)