The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
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Go to topicMaking space accessible and developing the technologies for the future
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This image shows the bright, nearby, and massive Coma galaxy cluster in X-ray and optical light, as seen by XMM-Newton’s European Photon Imaging Camera (EPIC) and the Sloan Digital Sky Survey (SDSS).
Using XMM-Newton to study Coma and another notably massive cluster, Perseus, astronomers spotted the first signs of gas sloshing around in Perseus – a behaviour that, while predicted, had never been seen before – while Coma appears to comprise two major sub-clusters that are slowly merging together.
Full story: First sighting of hot gas sloshing in galaxy cluster