描述
Signed album page, 4,25 x 3,5 inch, (Los Angeles County), 14.10.1945, signed and inscribed in blue "Alfred H. Joy - Mount Wilson Observatory - October 13-1945", attractively mounted (removable) for display with a photograph, shows Alfred Harrison Joy in a chest-up portrait (altogether 8,25 x 11,75 inch), with very mild signs of wear - in nearly very fine condition.
有关该人的更多信息
Profession:
(1882-1973) Astronomer best known for his work on stellar distances, the radial motion of stars, and variable stars.
Year of Birth: 1882
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