Stand on the historic Prime Meridian of the World at the home of Greenwich Mean Time (GMT), Unlimited entry all year from £49, including Planetarium shows, Visitor notice: All of our sites have reopened and we can't wait to welcome you back.

Before the mid 1850s it might be 2.30 in the afternoon where you were and 3.00 in the afternoon ten miles down the road! Royal Observatory Greenwich Audio Guide Tour.

Discover the remarkable story behind the reference line for Greenwich Mean Time (GMT). All visitors will need to book a ticket in advance.

Available from our Online Shop, our exclusive replica Shepherd Wall Clock.

The prime meridian is a geographical reference line that passes through the Royal Observatory, Greenwich, in London, England. Grab an iconic selfie on the historic Prime Meridian Line of the world and share using #PrimeMeridian; Discover the remarkable story behind the reference line for Greenwich Mean Time (GMT). This time zone is in use during standard time in: Europe, Africa, North America, Antarctica..

Greenwich Mean Time – How to ‘Officially’ Stand in Two Times Zones for Free. Stand on the historic Prime Meridian of the World at Royal Observatory Greenwich, the home of Greenwich Mean Time (GMT). Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. Greenwich Mean Time, Meridian Line, 0 Longitude. Find the perfect greenwich mean line stock photo. Home to the Meridian Line at the Royal Observatory, Cutty Sark, the National Maritime Museum, the Old Royal Naval College including the fabulous Painted Hall, London’s cable car, Greenwich Market, Greenwich Park and The O2 Arena. Log in, get borders of adventure updates by email, Visit the Greenwich Meridian Line in London – Time Travel in the City.

Tickets to the Meridian Line and Historic Royal Observatory also includes admission to our Time galleries and Great Equatorial Telescope.

It’s behind a black iron gate just next to the enclosed area where the long line is. Insight Investment Astronomy Photographer of the Year, Illuminated Meridian Line at night, Royal Observatory, Greenwich. Nowadays we all take it for granted that we can find out the right time wherever and whenever we are in the world. No need to register, buy now! Visit Greenwich and stand on the Prime Meridian, with a leg in each hemisphere, eastern and western, at the Royal Observatory. See full time zone map It was first put into place in December 1847 when the railways switched from local time to Greenwich Mean Time. Welcome to Greenwich.

Find out more about the historic Prime Meridian of the World, Share your best photos with us via Facebook, Instagram or Twitter.

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Look out for the green laser which marks the Meridian Line in the evening sky from the top of the hill in Greenwich Park towards the London Skyline.

But it wasn’t always like that.

Greenwich Mean Time (GMT) has no offset from Coordinated Universal Time (UTC). This time zone is often called Greenwich Mean Time. In 1884 the Prime Meridian was defined by Transit Circle telescope at the Royal Observatory which was built by Sir George Biddell Airy, the 7th Astronomer Royal, in 1850. The rest of the country followed and we were all waking up to Greenwich Mean Time by 1865 or so. Passengers didn’t want to find themselves turning up to meet the 11.00 train from Doncaster to Leeds only to find that nobody knew when exactly it might have been 11.00 in Doncaster or when the train would arrive – if it hadn’t arrived already. Visit Greenwich and stand on the Prime Meridian, with a leg in each hemisphere, eastern and western, at the Royal Observatory.. Nowadays we all take it for granted that we can find out the right time wherever and whenever we are in the world. So the standardisation of time began in the 1840s. The cross-hairs in the eyepiece of the telescope precisely defined Longitude 0° for the world. When you visit Greenwich, you can stand on the Prime Meridian, with a leg in each hemisphere, eastern and western, at the Royal Observatory!

It was first established by Sir George Airy in 1851, and by 1884, over two-thirds of all ships and tonnage used it as the reference meridian on their charts and maps. Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, reckoned from midnight.At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a … Find out how we're keeping you safe.

What is the Prime Meridian and why is it in Greenwich? Don't forget to include #PrimeMeridian, Royal Observatory, Meridian Line and Historic Royal Observatory, Meridian Courtyard. Since the late 19th century, the Prime Meridian at Greenwich has divided the eastern and western hemispheres of the earth - just as the equator divides the northern and southern hemispheres. There’s lots more to see as well – the original building was designed by Christopher Wren and houses the UK’s largest refracting telescope and a fantastic collection of clocks, astronomical instruments and other exciting artefacts. Local time was defined, generally, by the sun and could vary widely across the UK, which was a major headache for the expanding railway industry. Tickets to the Meridian Line and Historic Royal Observatory also includes admission to our Time galleries and Great Equatorial Telescope. Put simply, Greenwich Mean Time is the annual average of the time when the sun crosses the Prime Meridian at the Royal Observatory, Greenwich, (it’s an average – that’s why it’s called ‘Mean’). Longitude found - the story of Harrison's Clocks, Grab an iconic selfie on the historic Prime Meridian Line of the world and share using #PrimeMeridian.

For budget travellers and the more frugal amongst us, there is a very small section of shiny bronze line goodness you can stand on and pose for free. Coordinates.