Filtering by: Creator Luyten, Willem Jacob, 1899-1994 Remove constraint Creator: Luyten, Willem Jacob, 1899-1994 People Tucker, R. H. (Richard Hawley), 1859-1952 Remove constraint People: Tucker, R. H. (Richard Hawley), 1859-1952 Place Mount Hamilton Remove constraint Place: Mount Hamilton Topic Astronomical instruments Remove constraint Topic: Astronomical instruments Topic Astronomical observatories Remove constraint Topic: Astronomical observatories