A Trip Back in Time and Space -- Harvard's Cosmos

The New York Times has a good article on a dedicated effort to digitize the Harvard Observatory plate archive.

I hope Chicago eventually does the same with the Yerkes collection. With the closing of the Yerkes Library, much of the plate collection is coming down to campus, although I don't know how much of the telescopic plate collection is coming. Yerkes has a fantastic historical photo collection of observatories, instruments, and astronomers.