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  2. Royal Observatory, Greenwich - Wikipedia

    en.wikipedia.org/wiki/Royal_Observatory,_Greenwich

    The Royal Observatory, Greenwich (ROG; [1] known as the Old Royal Observatory from 1957 to 1998, when the working Royal Greenwich Observatory, RGO, temporarily moved south from Greenwich to Herstmonceux) is an observatory situated on a hill in Greenwich Park in south east London, overlooking the River Thames to the north.

  3. Shepherd Gate Clock - Wikipedia

    en.wikipedia.org/wiki/Shepherd_Gate_Clock

    It shows Greenwich Mean Time all year round. The Shepherd Gate Clock) is mounted on the wall outside the gate of the Royal Observatory, Greenwich building in Greenwich, Greater London. The clock, an early example of an electrically connected clock system, was a sympathetic clock mechanism controlled by electric pulses transmitted by a motor ...

  4. Prime meridian (Greenwich) - Wikipedia

    en.wikipedia.org/wiki/Prime_meridian_(Greenwich)

    The Greenwich meridian is a prime meridian, a geographical reference line that passes through the Royal Observatory, Greenwich, in London, England. [1] From 1884 to 1974, the Greenwich meridian was the international standard prime meridian, used worldwide for timekeeping and navigation.

  5. Greenwich 28-inch refractor - Wikipedia

    en.wikipedia.org/wiki/Greenwich_28-inch_refractor

    The Greenwich 28-inch refractor is a telescope at the Royal Observatory, Greenwich, where it was first installed in 1893.It is a 28-inch ( 71 cm) aperture objective lens telescope, otherwise known as a refractor, and was made by the telescope maker Sir Howard Grubb.

  6. List of largest optical telescopes in the British Isles

    en.wikipedia.org/wiki/List_of_largest_optical...

    Discovered as Georgium Sidus, later known as Uranus was one of the famous discoveries made from the British Isles The mirror from the 40-foot telescope, on display at the Science Museum, London. Former Royal Greenwich Observatory, Herstmonceux, East Sussex; this was an important site for telescopes in the latter 20th century in England.

  7. HM Nautical Almanac Office - Wikipedia

    en.wikipedia.org/wiki/HM_Nautical_Almanac_Office

    His Majesty's Nautical Almanac Office (HMNAO), now part of the United Kingdom Hydrographic Office, was established in 1832 on the site of the Royal Observatory, Greenwich (ROG), where The Nautical Almanac had been published since 1767. HMNAO produces astronomical data for a wide range of users, such as astronomers, mariners, aviators, surveyors ...

  8. Greenwich - Wikipedia

    en.wikipedia.org/wiki/Greenwich

    The Royal Observatory with the time ball atop the Octagon Room. Greenwich Mean Time (GMT) is a term originally referring to mean solar time at the Royal Observatory, Greenwich, which overlooks the River Thames from a hill in Greenwich Park.

  9. Director of the Royal Greenwich Observatory - Wikipedia

    en.wikipedia.org/wiki/Director_of_the_Royal...

    Executive responsibility for the Royal Observatory, Greenwich, London, had rested with the Astronomer Royal from the institution's foundation in 1675. This practice continued when the observatory moved to Herstmonceux Castle in 1948 and was renamed the Royal Greenwich Observatory.

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