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- Gaithersburg_Latitude_Observatory abstract "The Gaithersburg Latitude Observatory, in Gaithersburg, Maryland is one of the system of six International Latitude Observatories and (as of 2007) the only National Historic Landmark in Gaithersburg, Maryland. The building is in the National Register of Historic Places. The GLO was constructed by Edwin Smith, chief of the Instrument Division of the U.S. Coast and Geodetic Survey.The Gaithersburg Latitude Observatory was one of six observatories — and one of the four original observatories built by 1899 — tracking the degree of \"wobble\" occurring on the earth’s north-south axis and resultant variation of latitude. The Observatory — along with observatories in Cincinnati, Ohio; Ukiah, California; Mizusawa, Japan; Charjui in Russian Turkestan; and Carloforte, Sardina, Italy — performed in concert to carry out a coordinated program of star observation designed to investigate and calculate the degree of earth “wobble” or latitude variation.On the grounds of the Gaithersburg Latitude Observatory stands a plaque that reads:“This small framed structure played a key role in the scientific investigation of the Earth’s rotation. In 1898, the International Geodetic Association established a network of observatories to measure the wobble of the planet on its axis by plotting the locations of specific stars. This hilltop in Gaithersburg was chosen together with sites in California, Italy, Japan, and the Soviet Union. All five lay along the same latitude (39° 8’ N). The American Stations were supervised by the U.S. Coast and Geodetic Survey. The observatory’s roof was designed to part in the middle on two sets of tracks to expose the reflecting telescope inside to the night sky. Its slatted exterior walls stabilize the inside air to limit the effects of the temperatures on the accuracy of the telescope. The building’s white paint minimizes heat retention that creates air turbulence around the telescope at night, distorting the stars. Knowledge gained from the observations recorded here nightly until 1982 assisted scientists in the study of the Earth’s geophysical make-up and aided spacecraft orbiting the planet and navigating the universe.”A second portion of the observatory was constructed to house the Photographic Zenith Tube. The observers used the Photographic Zenith Tube to capture picture data using the Zenith telescope as a guide of alignment and star track. However, nothing now remains of this addition to the Gaithersburg Latitude Observatory.".
- Gaithersburg_Latitude_Observatory added "1985-07-12".
- Gaithersburg_Latitude_Observatory area "9307.76977152".
- Gaithersburg_Latitude_Observatory location Gaithersburg,_Maryland.
- Gaithersburg_Latitude_Observatory nrhpReferenceNumber "85001578".
- Gaithersburg_Latitude_Observatory thumbnail Gaithersburg_latitude_observatory_1.jpg?width=300.
- Gaithersburg_Latitude_Observatory wikiPageExternalLink hhh.md1207.
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- Gaithersburg_Latitude_Observatory wikiPageWikiLink Chandler_wobble.
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- Gaithersburg_Latitude_Observatory wikiPageWikiLink Gaithersburg,_Maryland.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink Global_Positioning_System.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink International_Latitude_Observatory.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink Library_of_Congress.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink Mizusawa,_Iwate.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink National_Historic_Landmark.
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- Gaithersburg_Latitude_Observatory wikiPageWikiLink National_Register_of_Historic_Places.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink Rockville,_Maryland.
- Gaithersburg_Latitude_Observatory wikiPageWikiLink U.S._National_Geodetic_Survey.
- Gaithersburg_Latitude_Observatory wikiPageWikiLinkText "Gaithersburg Latitude Observatory".
- Gaithersburg_Latitude_Observatory yearOfConstruction "1899".
- Gaithersburg_Latitude_Observatory added "1985-07-12".
- Gaithersburg_Latitude_Observatory builder "Smith, Edwin".
- Gaithersburg_Latitude_Observatory caption "Gaithersburg latitude observatory".
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- Gaithersburg_Latitude_Observatory dwgs "6".
- Gaithersburg_Latitude_Observatory governingBody "Local".
- Gaithersburg_Latitude_Observatory id "md1207".
- Gaithersburg_Latitude_Observatory latDegrees "39".
- Gaithersburg_Latitude_Observatory latDirection "N".
- Gaithersburg_Latitude_Observatory latMinutes "8".
- Gaithersburg_Latitude_Observatory latSeconds "12".
- Gaithersburg_Latitude_Observatory location Gaithersburg,_Maryland.
- Gaithersburg_Latitude_Observatory locmapin "Maryland".
- Gaithersburg_Latitude_Observatory longDegrees "77".
- Gaithersburg_Latitude_Observatory longDirection "W".
- Gaithersburg_Latitude_Observatory longMinutes "11".
- Gaithersburg_Latitude_Observatory longSeconds "57".
- Gaithersburg_Latitude_Observatory name "Gaithersburg Latitude Observatory".
- Gaithersburg_Latitude_Observatory nocat "yes".
- Gaithersburg_Latitude_Observatory nrhpType "nhld".
- Gaithersburg_Latitude_Observatory refnum "85001578".
- Gaithersburg_Latitude_Observatory survey "MD-78".
- Gaithersburg_Latitude_Observatory title "Gaithersburg Latitude Observatory, 100 De Sellum Avenue, Gaithersburg, Montgomery County, MD".
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- Gaithersburg_Latitude_Observatory wikiPageUsesTemplate Template:Start_date.
- Gaithersburg_Latitude_Observatory subject Category:1899_establishments_in_Maryland.
- Gaithersburg_Latitude_Observatory subject Category:Astronomical_observatories_in_Maryland.
- Gaithersburg_Latitude_Observatory subject Category:Buildings_and_structures_in_Gaithersburg,_Maryland.
- Gaithersburg_Latitude_Observatory subject Category:Government_buildings_completed_in_1899.
- Gaithersburg_Latitude_Observatory subject Category:Government_buildings_on_the_National_Register_of_Historic_Places_in_Maryland.
- Gaithersburg_Latitude_Observatory subject Category:Historic_American_Engineering_Record_in_Maryland.
- Gaithersburg_Latitude_Observatory subject Category:Historic_districts_on_the_National_Register_of_Historic_Places_in_Maryland.
- Gaithersburg_Latitude_Observatory subject Category:National_Historic_Landmarks_in_Maryland.
- Gaithersburg_Latitude_Observatory hypernym System.
- Gaithersburg_Latitude_Observatory point "39.13666666666666 -77.19916666666667".
- Gaithersburg_Latitude_Observatory type District.
- Gaithersburg_Latitude_Observatory type HistoricPlace.
- Gaithersburg_Latitude_Observatory type Place.
- Gaithersburg_Latitude_Observatory type Attraction.
- Gaithersburg_Latitude_Observatory type District.
- Gaithersburg_Latitude_Observatory type Place.
- Gaithersburg_Latitude_Observatory type Site.
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- Gaithersburg_Latitude_Observatory type Place.
- Gaithersburg_Latitude_Observatory type Thing.
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- Gaithersburg_Latitude_Observatory comment "The Gaithersburg Latitude Observatory, in Gaithersburg, Maryland is one of the system of six International Latitude Observatories and (as of 2007) the only National Historic Landmark in Gaithersburg, Maryland. The building is in the National Register of Historic Places. The GLO was constructed by Edwin Smith, chief of the Instrument Division of the U.S.".
- Gaithersburg_Latitude_Observatory label "Gaithersburg Latitude Observatory".
- Gaithersburg_Latitude_Observatory sameAs Q5517395.
- Gaithersburg_Latitude_Observatory sameAs m.03d7ht.
- Gaithersburg_Latitude_Observatory sameAs Q5517395.
- Gaithersburg_Latitude_Observatory lat "39.13666666666666".
- Gaithersburg_Latitude_Observatory long "-77.19916666666667".
- Gaithersburg_Latitude_Observatory wasDerivedFrom Gaithersburg_Latitude_Observatory?oldid=701758214.
- Gaithersburg_Latitude_Observatory depiction Gaithersburg_latitude_observatory_1.jpg.
- Gaithersburg_Latitude_Observatory isPrimaryTopicOf Gaithersburg_Latitude_Observatory.
- Gaithersburg_Latitude_Observatory name "Gaithersburg Latitude Observatory".