The New Crescent Society, which is organizing the Greenwich event with the Royal Observatory, is hoping moon sighting will become fully established in Britain and be used by mosques.

To a navigator, time and distance are tightly linked. Earth turns 360 degrees on its axis every 24 hours. This means that a person standing on the equator travels east one degree of longitude, ...

The Royal Observatory in Greenwich is to become a working observatory again, six decades after light and air pollution forced astronomers out of the capital. After hosting stargazers for nearly three ...

The famed Royal Observatory in Greenwich, United Kingdom, is reopening more than 60 years after London’s smog forced its closure in 1957. By the 1940s and 1950s, London’s industrialization—which ...

The historic Royal Observatory was founded in 1675 by King Charles II of England, with the goal of improving navigation at sea and reducing shipwrecks by mapping the locations of stars. The ...

A tiny observatory on Hampstead Heath was built more than 100 years ago. With light pollution, the capital is not the best place in the world for stargazing. But with the right gear and a bit of luck ...