Digital Access to a Sky Century at Harvard

Portion of Plate b41215 of Halley's comet taken on April 21, 1910 from Arequipa, Peru with the 8-inch Bache Doublet, Voigtlander. The exposure was 30 minutes centered on 23h41m29s R.A. and +07d21m09s Declination.Portion of plate B41215. (1910).

A New Look at the Temporal Universe

The goal of DASCH is to support the systematic study of the sky on 100 year time scales. To do this the DASCH team is working to digitize the majority of the Astronomical Photographic Glass Plate Collection's 550,000 glass plate negatives to produce full photometry results for the entire sky.

Project Status

The DASCH project has been a herculean effort spanning two decades. In order to ensure that the plate scanning is brought to completion, and that the resulting data are archived and as useful as possible, the project is undergoing a technical overhaul under the direction of the Wolbach Library. During this time access to DASCH data via existing interfaces may be limited. Please refer to our project FAQ and contact Daina Bouquin, Head Librarian of the Wolbach Library, if you have additional questions. We will do everything we can to respond to your request.

By making the DASCH project part of the Library's portfolio of initiatives we are able to more fully benefit from resources available through the Harvard Library and the Weissman Preservation Center, in addition to gaining access to support from our expert colleagues at the Smithsonian Institution. 

We are excited about this new phase of the project and looking forward to sharing updates as we make progress.