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

Click here for temporal distribution

Entire Series
(30090 plates)

1915-1920
(2682 plates)

1920-1930
(6282 plates)

1930-1940
(11481 plates)

1940-1950
(8512 plates)

1950-1962
(1133 plates)