Royal Observatory Greenwich

19th century astronomers when beyond cataloguing the skies to understanding their composition and predicting what could not be seen.

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?

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.

Why was Greenwich chosen as where east meets west at Longitude 0°?

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.

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

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.

Pages