royal greenwich observatory

الإنجليزية - الإنجليزية

تعريف royal greenwich observatory في الإنجليزية الإنجليزية القاموس.: the British national observatory (=a place where scientists study the stars) , which was established in the 17th century, in Greenwich, South London, although it was moved away from there after World War II and it is now in Cambridge. The 0° meridian (=an imaginary line that divides the east part of the world from the west) passes through the building in Greenwich. Greenwich Mean Time. Astronomical observatory, oldest scientific institution in Britain, founded for navigational purposes in 1675 by Charles II at Greenwich, England. Its main contributions have been in navigation, timekeeping, determination of star positions, and almanac publication. In 1767 it began publishing The Nautical Almanac, based on the time at the longitude of Greenwich; its popularity among navigators led in part to the Greenwich meridian's being made Earth's prime meridian and the starting point for international time zones in 1884 (see Greenwich Mean Time)

royal greenwich observatory