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The Prime Meridian is unmoved

This article was written by Rob Edwards, Head of Science Learning at the Royal Observatory Greenwich. In August 2015 a paper was published by scientists in the US explaining why the Prime Meridian at the Royal Observatory Greenwich is 102 metres to the west of the prime meridian used by…

It all started with a rumour…founding of the Royal Observatory

Today marks the 340th anniversary of the founding of our Observatory – Britain’s first state-funded scientific research institution. Our Curator Louise tells us more.  If you’d stood here on the hill in Greenwich Park 340 years ago today you would have seen an important event. At 3.14pm on 10 August…

Just a second …

Do you ever find yourself wishing that there were more hours in the day? If so, you may be comforted to know that Tuesday, June 30, 2015 will actually be a little longer than normal this year; not by hours, but a single second – a leap second. This peculiar…

A giant tool in the sky – testing general relativity

As we approach the Summer Solstice, our Curator of the Royal Observatory looks at how the sun was used nearly 100 years ago to test Einstein’s theory of general relativity.   It’s great to enjoy the sunshine and long hours of daylight at this time of year. As we approach the Summer…