Harvard Plate Stacks

E540355

astronomical photographic plate archive historical scientific archive

Harvard Plate Stacks is a historic archive of astronomical photographic plates at the Harvard College Observatory that has been central to long-term studies of variable stars and other celestial phenomena.

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All labels observed (4)

Label	Occurrences
Harvard College Observatory plate collection	3
Harvard College Observatory photographic plate collection	2
Harvard Plate Stacks canonical	1
Harvard plate stacks	1

How this entity was disambiguated

This entity first appeared as the object of triple T5721023 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Harvard Plate Stacks
Context triple: [Harvard College Observatory, hasPart, Harvard Plate Stacks]

A. Harvard Library
Harvard Library is the extensive academic library system of Harvard University, recognized as one of the largest and most comprehensive research library networks in the world.
B. Harvard-Yenching Library
The Harvard-Yenching Library is Harvard University's primary research library for East Asian studies, renowned for its extensive collections of Chinese, Japanese, Korean, and other East Asian materials.
C. Harvard Public Library
Harvard Public Library is the public library serving the town of Harvard, Massachusetts, providing community access to books, media, and educational resources.
D. Cabot Science Library
Cabot Science Library is a major Harvard University library focused on supporting undergraduate education and research in the sciences and related fields.
E. Houghton Library
Houghton Library is Harvard University's principal rare books and manuscripts library, renowned for its extensive collections of literary, historical, and cultural materials.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Harvard Plate Stacks
Target entity description: Harvard Plate Stacks is a historic archive of astronomical photographic plates at the Harvard College Observatory that has been central to long-term studies of variable stars and other celestial phenomena.

A. Harvard Library
Harvard Library is the extensive academic library system of Harvard University, recognized as one of the largest and most comprehensive research library networks in the world.
B. Harvard-Yenching Library
The Harvard-Yenching Library is Harvard University's primary research library for East Asian studies, renowned for its extensive collections of Chinese, Japanese, Korean, and other East Asian materials.
C. Harvard Public Library
Harvard Public Library is the public library serving the town of Harvard, Massachusetts, providing community access to books, media, and educational resources.
D. Cabot Science Library
Cabot Science Library is a major Harvard University library focused on supporting undergraduate education and research in the sciences and related fields.
E. Houghton Library
Houghton Library is Harvard University's principal rare books and manuscripts library, renowned for its extensive collections of literary, historical, and cultural materials.
F. None of above. chosen

Statements (46)

Predicate	Object
instanceOf	astronomical photographic plate archive ⓘ historical scientific archive ⓘ
associatedProject	DASCH (Digital Access to a Sky Century @ Harvard) ⓘ linked to: Digitized Sky Survey
associatedWith	Annie Jump Cannon ⓘ Antonia Maury ⓘ Edward Charles Pickering ⓘ Harvard College Observatory women computers ⓘ linked to: Harvard College Observatory Henrietta Swan Leavitt ⓘ Williamina Fleming ⓘ
collectionType	astronomical images ⓘ photographic plates ⓘ
containsDataOn	asteroids ⓘ comets ⓘ galaxies ⓘ novae ⓘ quasars ⓘ supernovae ⓘ transient astronomical events ⓘ variable stars ⓘ
country	United States of America ⓘ
digitizationProject	DASCH (Digital Access to a Sky Century @ Harvard) ⓘ linked to: Digitized Sky Survey
field	astronomy ⓘ astrophysics ⓘ history of science ⓘ
hasPart	Harvard College Observatory photographic plate collection ⓘ linked to: Harvard Plate Stacks
heritageStatus	historically significant scientific collection ⓘ
institutionalAffiliation	Harvard University Department of Astronomy ⓘ
locatedIn	Cambridge, Massachusetts ⓘ
material	glass photographic plates ⓘ
notableFor	continuous sky coverage over more than a century ⓘ one of the largest collections of astronomical photographic plates ⓘ
operator	Harvard College Observatory ⓘ Harvard University ⓘ
partOf	Harvard College Observatory ⓘ
preservationActivity	digitization of photographic plates ⓘ environmental control for plate storage ⓘ
researchImportance	enables century-scale variability studies ⓘ provides historical baselines for modern surveys ⓘ supports calibration of long-term light curves ⓘ
timeSpanCovered	late 19th century to late 20th century ⓘ
usedFor	historical sky surveys ⓘ long-term studies of variable stars ⓘ photometric variability studies ⓘ proper motion studies ⓘ studies of other celestial phenomena ⓘ time-domain astronomy ⓘ

How these facts were elicited