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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 an overhaul under the direction of the Harvard College Observatory. During this time, our servers will be down and access to DASCH data via existing interfaces will be limited. Please contact Purvang Patel, Executive Director at the Harvard College Observatory, if you have questions.