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- David_Dunlap_Observatory abstract "The David Dunlap Observatory (DDO) is a large astronomical observatory site just north of Toronto in Richmond Hill, Ontario within a 189-acre (76 ha) estate. Formerly owned and operated by the University of Toronto from its establishment in 1935 until 2008, the observatory is now managed by the Royal Astronomical Society of Canada, Toronto Centre. Its primary instrument is a 74-inch (1.88 m) reflector telescope, at one time the second largest telescope in the world, and still the largest in Canada. Several other telescopes are also located at the site, which formerly included a small radio telescope as well.Located on a hill, yet still relatively close to sea level at 730 ft. (238 m) above sea level, and now surrounded by subdivisions, optical astronomy ability has been reduced as compared to other remote observatory sites around the world. Nevertheless, the DDO can still be used for spectral astronomy and is the site of a number of important studies, including pioneering measurements of the distance to globular clusters, providing the first direct evidence that Cygnus X-1 was a black hole, and the discovery that Polaris was stabilizing and appeared to be "falling out" of the Cepheid variable category.".
- David_Dunlap_Observatory thumbnail Dunlap_Observatory.jpg?width=300.
- David_Dunlap_Observatory wikiPageExternalLink DunlapObkey.html?1.
- David_Dunlap_Observatory wikiPageExternalLink pool.
- David_Dunlap_Observatory wikiPageExternalLink observatoryhill.ca.
- David_Dunlap_Observatory wikiPageExternalLink DDO.
- David_Dunlap_Observatory wikiPageExternalLink weatherddo.html.
- David_Dunlap_Observatory wikiPageExternalLink ddo.rasc.html.
- David_Dunlap_Observatory wikiPageExternalLink history.html.
- David_Dunlap_Observatory wikiPageExternalLink mcrae.htm.
- David_Dunlap_Observatory wikiPageExternalLink www.coolcosmos.net.
- David_Dunlap_Observatory wikiPageExternalLink www.rascto.ca.
- David_Dunlap_Observatory wikiPageExternalLink save-the-observatory.
- David_Dunlap_Observatory wikiPageExternalLink www.theddo.ca.
- David_Dunlap_Observatory wikiPageExternalLink www.theddo.ca).
- David_Dunlap_Observatory wikiPageExternalLink www.theddo.ca.
- David_Dunlap_Observatory wikiPageID "725242".
- David_Dunlap_Observatory wikiPageRevisionID "603001764".
- David_Dunlap_Observatory altitude "224 m".
- David_Dunlap_Observatory caption "The telescope at the David Dunlap Observatory".
- David_Dunlap_Observatory established "1935-05-31".
- David_Dunlap_Observatory hasPhotoCollection David_Dunlap_Observatory.
- David_Dunlap_Observatory location Canada.
- David_Dunlap_Observatory location Ontario.
- David_Dunlap_Observatory location Richmond_Hill,_Ontario.
- David_Dunlap_Observatory name "David Dunlap Observatory".
- David_Dunlap_Observatory organization University_of_Toronto.
- David_Dunlap_Observatory organization "Royal Astronomical Society of Canada".
- David_Dunlap_Observatory reOpened "July 2009".
- David_Dunlap_Observatory telescope1Name "Telescope 1".
- David_Dunlap_Observatory telescope1Type "112.8".
- David_Dunlap_Observatory telescope2Name "Telescope 2".
- David_Dunlap_Observatory telescope2Type "36.0".
- David_Dunlap_Observatory telescope3Name "Telescope 3".
- David_Dunlap_Observatory telescope3Type "30.0".
- David_Dunlap_Observatory weather "67".
- David_Dunlap_Observatory website DDO.
- David_Dunlap_Observatory website www.theddo.ca.
- David_Dunlap_Observatory subject Category:Astronomical_observatories_in_Canada.
- David_Dunlap_Observatory subject Category:Buildings_and_structures_completed_in_1935.
- David_Dunlap_Observatory subject Category:Buildings_and_structures_in_Richmond_Hill,_Ontario.
- David_Dunlap_Observatory subject Category:University_of_Toronto_buildings.
- David_Dunlap_Observatory point "43.86222222222222 -79.4225".
- David_Dunlap_Observatory type Artifact100021939.
- David_Dunlap_Observatory type AstronomicalObservatoriesInCanada.
- David_Dunlap_Observatory type Building102913152.
- David_Dunlap_Observatory type BuildingsAndStructuresCompletedIn1935.
- David_Dunlap_Observatory type BuildingsAndStructuresInRichmondHill,Ontario.
- David_Dunlap_Observatory type Object100002684.
- David_Dunlap_Observatory type Observatory103839671.
- David_Dunlap_Observatory type PhysicalEntity100001930.
- David_Dunlap_Observatory type Structure104341686.
- David_Dunlap_Observatory type Whole100003553.
- David_Dunlap_Observatory type YagoGeoEntity.
- David_Dunlap_Observatory type YagoPermanentlyLocatedEntity.
- David_Dunlap_Observatory type SpatialThing.
- David_Dunlap_Observatory comment "The David Dunlap Observatory (DDO) is a large astronomical observatory site just north of Toronto in Richmond Hill, Ontario within a 189-acre (76 ha) estate. Formerly owned and operated by the University of Toronto from its establishment in 1935 until 2008, the observatory is now managed by the Royal Astronomical Society of Canada, Toronto Centre.".
- David_Dunlap_Observatory label "David Dunlap Observatory".
- David_Dunlap_Observatory label "David Dunlap Observatory".
- David_Dunlap_Observatory label "David Dunlap Observatory".
- David_Dunlap_Observatory label "Observatoire David Dunlap".
- David_Dunlap_Observatory label "Observatório David Dunlap".
- David_Dunlap_Observatory label "Обсерватория им. Дэвида Данлэпа".
- David_Dunlap_Observatory label "デービッド・ダンラップ天文台".
- David_Dunlap_Observatory sameAs David_Dunlap_Observatory.
- David_Dunlap_Observatory sameAs Observatoire_David_Dunlap.
- David_Dunlap_Observatory sameAs David_Dunlap_Observatory.
- David_Dunlap_Observatory sameAs デービッド・ダンラップ天文台.
- David_Dunlap_Observatory sameAs Observatório_David_Dunlap.
- David_Dunlap_Observatory sameAs m.035y77.
- David_Dunlap_Observatory sameAs Q531487.
- David_Dunlap_Observatory sameAs Q531487.
- David_Dunlap_Observatory sameAs David_Dunlap_Observatory.
- David_Dunlap_Observatory lat "43.86222222222222".
- David_Dunlap_Observatory long "-79.4225".
- David_Dunlap_Observatory wasDerivedFrom David_Dunlap_Observatory?oldid=603001764.
- David_Dunlap_Observatory depiction Dunlap_Observatory.jpg.
- David_Dunlap_Observatory homepage DDO.
- David_Dunlap_Observatory isPrimaryTopicOf David_Dunlap_Observatory.