Royal Observatory Greenwich
Whether it's observing the stars, standing astride the Prime Meridian or marvelling at John Harrison's timepieces, the Royal Observatory Greenwich provides a treasure trove of fascinating information. Read all about the history of space, time and navigation, plus find out more about the Insight Astronomy Photographer of the Year competition.
Discover the story of the founding of our Observatory, Britain's first state-funded scientific research institution.
The story of Astronomer Royal George Biddell Airy and the remarkable Airy Transit Circle telescope he designed at the Royal Observatory Greenwich.
In August 2015 a paper was published by scientists in the US explaining why the Prime Meridian at the Royal Observatory Greenwich is 102 metres to the west of the prime meridian used by satellite based navigation and timekeeping, known as the International Reference Meridian or IRM. The paper created quite a stir in the media.
19th-century astronomers went beyond cataloguing the skies to understanding their composition and predicting what could not be seen.