The Royal Observatory is part of Royal Museums Greenwich and home of Greenwich Mean Time and the Prime Meridian line. It is one of the most important historic scientific sites in the world. It was founded by Charles II in 1675 and is, by international decree, the official starting point for each new day, year and millennium (at the stroke of midnight GMT as measured from the Prime Meridian).

Visitors to the Observatory can stand in both the eastern and western hemispheres simultaneously by placing their feet either side of the Prime Meridian - the centre of world time and space. The Observatory galleries unravel the extraordinary phenomena of time, space and astronomy, the Planetarium lets visitors explore the wonders of the heavens and Flamsteed House, Sir Christopher Wren's original building, also has London's only public camera obscura.

Astronomy Photographer of the Year

The Royal Observatory is proud to present Astronomy Photographer of the Year - a free competition and exhibition for everyone who loves the night sky.
rmg.co.uk/astrophoto
flickr.com/groups/astrophoto