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Từ điển Oxford Advanced Learner 8th
the Royal Observatory
the Royal Observatory [the Royal Observatory] BrE NAmE (alsothe Royal Greenwich Observatory)
an ↑observatory (= a building from which to study the stars, weather, etc.) at ↑Greenwich, London, England. Its original purpose was to study the stars in order to help sailors find their position at sea, and its work led to the widespread use of ↑Greenwich Mean Time and the Greenwich Meridian, an imaginary line running through Greenwich from north to south around the earth. International time ↑zones are still measured from the Greenwich Meridian. The building is now part of the ↑National Maritime Museum.
See also ↑Astronomer Royal
See also: ↑Royal Greenwich Observatory
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