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History
Royal Observatory, Greenwich
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The Royal Observatory, Greenwich is an observatory situated on a hill in Greenwich Park in south east London, overlooking the River Thames to the north. It played a major role in the history of astronomy and navigation, and because the Prime Meridian passed through it, it gave its name to Greenwich Mean Time, the precursor to today's Coordinated Universal Time (UTC). The ROG has the IAU observatory code of 000, the first in the list. ROG, the National Maritime Museum, the Queen's House and the clipper ship Cutty Sark are collectively designated Royal Museums Greenwich.
Royal Observatory, Greenwich. A time ball sits atop the Octagon Room.
Royal Observatory, Greenwich. A time ball sits atop the Octagon Room.
The Airy Transit Circle, used for over a century (1851–1953) as the reference point when charting the heavens and determining times, thus earning for
The Airy Transit Circle, used for over a century (1851–1953) as the reference point when charting the heavens and determining times, thus earning for it the epithet "the centre of time and space"
The building housing the origin of the Greenwich Prime Meridian, marked by the brass strip in the foreground. The apex of the roof opens up above the
The building housing the origin of the Greenwich Prime Meridian, marked by the brass strip in the foreground. The apex of the roof opens up above the white vertical strips (joints in the eaves are visible) to allow telescopic star sightings to be made.
The Shepherd Gate Clock at the gates of the Royal Greenwich Observatory. This clock shows Greenwich Mean Time all year round, ie. it is not set to Bri
The Shepherd Gate Clock at the gates of the Royal Greenwich Observatory. This clock shows Greenwich Mean Time all year round, ie. it is not set to British Summer Time in the summer.
Observatory
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An observatory is a location used for observing terrestrial, marine, or celestial events. Astronomy, climatology/meteorology, geophysics, oceanography and volcanology are examples of disciplines for which observatories have been constructed. Historically, observatories were as simple as containing an astronomical sextant or Stonehenge.
The Sphinx Observatory on a mountain top in the Swiss Alps at 3,571 m (11,716 ft)
The Sphinx Observatory on a mountain top in the Swiss Alps at 3,571 m (11,716 ft)
Atacama Large Millimeter Array, Chile, at 5,058 m (16,594 ft)
Atacama Large Millimeter Array, Chile, at 5,058 m (16,594 ft)
Paranal Observatory, Chile, home of the VLT at 2,635 m (8,645 ft)
Paranal Observatory, Chile, home of the VLT at 2,635 m (8,645 ft)
The Mauna Kea Observatories, Hawaii, home of several of the world's largest optical telescopes at 4,205 m (13,796 ft)
The Mauna Kea Observatories, Hawaii, home of several of the world's largest optical telescopes at 4,205 m (13,796 ft)