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See the spectacular winning images from Astronomy Photographer of the Year 2021

Why does the Royal Observatory have the Prime Meridian? How long has the site been here? And why does the Observatory exist at all? To answer all these questions, and more, join Royal Observatory astronomers and curators and explore the history of the Royal Observatory Greenwich! 

ROG astronomer Brendan explains how we determine the age of our Solar System from space rocks and how we can work out how long the Sun has left before it engulfs the inner planets.

Our Universe is a facinating and beautiful place. Join the Royal Observatory Greenwich astronomers as they head off on a voyage of discovery to find out just what it is that makes it so colourful.

From Newton’s longstanding ideas to Einstein’s revolutionary theories, Royal Observatory Greenwich astronomers explain how our understanding of gravity has changed from looking at how gravity affects us in our daily lives and how it governs what we observe in space.

Royal Observatory astronomer Rad explains where black holes come from, how we know they’re there and the strange effects they have on surrounding matter. 

Royal Observatory astronomer Liz shows us the expanding nature of the Universe and how this affects the light reaching us from distant galaxies, some of which will remain forever hidden from our view.

The Rosetta Mission has captured the interest and imagination of a generation and it is not over yet! Take a look at our video which explains what Rosetta and Philae have achieved as well as the impact the mission has had on our knowledge of our very own solar system.

There are lots of names associated with space rocks, so what is the difference? Join the Royal Observatory Greenwich astronomers to find out.