Simon Owens writes about an interesting citizen science project at the Harvard-Smithsonian Center for Astrophysics : Why Harvard and the Smithsonian teamed up to crowdsource a century of astronomical history – Simon Owens
The goal of the project is
to transcribe logbooks for nearly half a million photographic plates of the night sky that had been taken over the course of a hundred years.
The project, called Digital Access to a Sky Century at Harvard (DASCH for short), is actually a collaboration between the Harvard College Observatory and the Smithsonian Institution, the latter of which has embarked on a much larger endeavor to crowdsource the transcription of millions of pages of archival material.
See also the Smithsonian Digital Volunteers site where the transcription projects are managed. And here is a listing of the logbooks being transcribes by the DASCH project.