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
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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Last year, ESA's Gaia mission helped astronomers make unique observations of Neptune's large moon Triton as it passed in front of a distant star. This is a preview of the superb quality and versatility of the Gaia data that will be released in April.
For more about this story see Chasing a stellar flash with assistance from Gaia