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.

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Meridian astronomy is the meticulous surveying of the stars so that positions and movements of stars can be known accurately.

How and, more importantly, why do we measure the brightness of stars?

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The challenges of measuring everything from a fast-moving, wobbly platform through a haze.

With a telescope we can see billons of miles and travel effortlessly back billions of years in time.

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Why was Greenwich chosen as the home of the Prime Meridian and Greenwich Mean Time, and what do those terms mean?

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Science and secret missions in the South Seas; innovations, discoveries and derring do. Cook’s first great voyage quickly became the stuff of legend.

Everything you need to know to start you on the road to becoming an amateur or professional astronomer.

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How astronomers including Nevil Maskelyne, fifth Astronomer Royal, helped solve the longitude problem.

Hunting Moon © Jean Baptise Feldmann, Astronomy Photographer of the Year People and Space Runner Up 2011

It is a star, is it a planet or is it a plane? A handy guide to identifying that bright object you saw last night.

The Astronomer Royal is the best-known and most prestigious post in astronomy with illustrious forebears such as Flamsteed and Halley.

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