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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Parts of Europe and the US experienced a decrease in nitrogen dioxide levels over the last 15 years (evident in blue). The top map is based on measurements from the GOME instrument on ERS-2 between 1996 and 2002. The lower map is based on measurements from Sciamachy on Envisat from 2003 to 2011.