Telescope Data Center Harvard Plate Collection Harvard-Smithsonian Center for Astrophysics
Harvard Observatory Plate Stacks
MA Series Plate Centers

Click here for temporal distribution

Entire Series
(6193 plates)

1905-1910
(831 plates)

1910-1920
(744 plates)

1920-1930
(352 plates)

1930-1940
(3135 plates)

1940-1950
(988 plates)

1950-1977
(145 plates)