Closure of Great Equatorial Dome and Time for Navy Gallery

The Great Equatorial Dome and the Time for Navy Gallery will be closed between 11:30am and 3.45pm on Tuesdays, Wednesdays and Thursdays from 25 July to 24 August for Daytime sky watch sessions 

Planetarium closures

Visiting the planetarium? Our planetarium is open daily, 10am-5pm. It is closed for maintenance on the first Tuesday of every month from September 2017. See what's on and choose your next space adventure

Over Women's History Month we'll be sharing the stories of amazing women who've made essential contributions to our observatory. 

March is Women's History Month - an important time to highlight the contributions of women to events in history and contemporary society. In Greenwich these contributions are clear, not only to the wider history of science but to our own history and the very existence of the Royal Observatory. Over the course of the month we'll be sharing the stories of these amazing women. Without them, astronomy might lack knowledge of comets, pulsars, sunspots, longitude - and even time itself! 

Louise De Keroualle (1649 - 1734)

Louise De Keroualle

Louise De Keroualle helped spark the race to find longitude, and encouraged the founding of our Observatory here in Greenwich.

At a young age she was given a place in the house of the Duchess of Orleans, who died suddenly whilst on a visit to Charles II at Dover. The king decided to appoint her as a lady-in-waiting to his Queen, Catherine of Braganza. Wilful, smart and beautiful - Louise was an irresistible temptation to Charles. She became one of his many mistresses and was later created Duchess of Portsmouth.

In that dangerous age of navigation, the difficult question of how sailors could find longitude at sea was of pressing importance. The Royal Society, created by Charles to advance science, urged him to build an observatory to research more accurate astronomical data that could help provide a solution. Plans were not progressing and Louise tried to end the bureaucratic mess by introducing Charles to a French astronomer, St Pierre, who claimed he could calculate longitude.

The twenty-seven year old John Flamsteed, who would become the first Astronomer Royal, tested St Pierre's method and found that it, just like other purported methods of the time, worked in theory but not in practice. The infrastructure needed in order to find the data was lacking - namely, an observatory. This convinced the King to sign the warrant to build the Royal Observatory.

Next we'll be looking at the first paid female astronomer in history - Caroline Herschel.

The text within this blog was drawn from the booklet 'Women, Astronomy & Greenwich' written by Kelley Swain.