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About the DASCH Databases

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The DASCH project data is currently organized in three MySQL databases: the scanner database, the photometry database, and the auxscanner database. The scanner database contains the logbook information and keeps track of the scanning and processing of...

Plate Series

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Plates are cataloged by plate series and plate number. Each series typically represents a single telescope although some series, notably the "mb" series consists of data from multiple telescopes. Telescopes were occasionally moved to other observatories...

Plate Classes

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Every plate is assign a class designation to indicate the type of exposure that was taken. The following table comes primarily from the Harvard Annals, Vol 26, page 9. The list from the above references is incomplete and does not account for all of the...

Digital Access to a Sky Century at Harvard

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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...

Exhibit Loans

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Requests for Exhibition Loans Please contact the Harvard Plate Stacks, to discuss loans for exhibitions. Please note, a readable copy or facsimile is typically preferred to the loan of original materials. Our main concern is for the survival of the...

PHaEDRA Book Club - Rise of the Rocket Girls

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At our May Office Hour we will be wrapping up our Spring Book Club with Rise of the Rocket Girls by Nathalia Holt. If you only have time to read one chapter, check out Chapter 9, Planetary Pull, as we will be focusing several of our discussion questions...

Acknowledgements

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Icons courtesty of the Space1 and Space2 Collections by Nook Fulloption, and a Planet icon from Alex Muravev.

About the Glass Plates

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Find out more about the instruments and observatories that created Harvard's Astronomical Photographic Glass Plate Collection. Plate Series Plate Classes Browse Telescopes Browse Observatories The 24 inch Bruce Doublet at the Harvard Boyden Station in...

Office Hours with Women's History Curator, Emily Margolis

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Women's history curator Emily Margolis invites you to join her for informal office hours. Please stop by the Library to say hello or to learn more about women's history projects at the Smithsonian. If you can't make it in-person, Emily is happy to meet...

Glass Plate Collection Highlights

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Section of plate A13151 showing the Orion Nebula The below galleries represent highlights from the 550,000 glass plates in the Harvard College Observatory's Astronomical Photographic Glass Plate Collection. Information about reproducing these images in...

PHaEDRA Office Hours - Virtual Plate Stacks Tour

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We will be hosting a virtual tour of the Photographic Plate Stacks here at the Wolbach Library, with Sarah Lavallee, Acting Curator of Astronomical Photographs. Click here to register for the June PHaEDRA Office Hours (Plate Stacks Tour)

PHaEDRA Office Hours - Plate Numbers Complete!

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We will be celebrating the upcoming completion of the plate number phase of Star Notes, and we will have an intern from the Smithsonian's American Women's History Initiative as a guest speaker to talk about their work on the oral histories of the DASCH...