The Royal Observatory, Greenwich  

Home of the Greenwich Meridian and Greenwich Mean Time 

Established in Greenwich in 1675, the Royal Observatory moved to Herstmonceux in 1948, where it was greatly expanded and renamed the Royal Greenwich Observatory. In 1990, following a downsizing, it moved to Cambridge where it remained until it was closed down by the Particle Physics and Astronomy Research Council (PPARC) in 1998.



Recently posted:

Bradley’s 8-foot Transit Telescope (defining the Greenwich Meridian from 1750–1816)

Airy’s Zenith Sector (designed for the Ordnance Survey in 1841)

The small transit telescopes (originally purchased for the British 1874 Transit of Venus expeditions and most recently used by the Greenwich Time Service from 1927–1957)

Small Transit by Cooke, Troughton & Simms (acquired for the Greenwich Time Service c.1939 and destroyed by enemy action in October 1940

The Bamberg ‘broken’ transit telescope (used by the Greenwich Time Service from 1947–1955)