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Browse over 100 amazing attractions at Royal Museums Greenwich, including Nelson's Trafalgar coat, John Harrison's famous timepieces and Turner's largest painting.

The Prime Meridian was defined at the Royal Observatory Greenwich by the legendary Airy Transit Circle telescope.

See the perfectly formed Altazimuth Pavilion for free at the Royal Observatory Greenwich.

Imagine if you created a whole new type of clock, how would it work? Find Flamsteed's brilliant (but doomed) attempt to make a perfect astronomers' clock.

Who are the people whose work at the Royal Observatory was so important in our understanding of the universe?