Royal Greenwich Observatory: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Last updated

Sep. 25, 2026

Facts

Notable Works	“The Nautical Almanac”

Photos and Videos

Royal Greenwich Observatory

Investigate the global importance of the Royal Greenwich Observatory and how its location was chosen

See All Videos and Images →

Topics

Laser Interferometer Gravitational-Wave Observatory Arecibo Observatory Very Large Telescope Palomar Observatory Mauna Kea Observatory FAST Jodrell Bank Observatory Keck Observatory Mount Wilson Observatory Gran Telescopio Canarias

View of the Andromeda Galaxy (Messier 31, M31).

Astronomy and Space Quiz