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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The Atmospheric Limb Tracker for Investigation of the Upcoming Stratosphere (Altius) satellite platform and solar array structural and thermal model in construction and on a vibration shaker in 2019. Carrying an instrument that images in the ultraviolet, visible and near-infrared channels, Altius will provide profiles of stratospheric ozone. It will also measure other atmospheric trace gases such as nitrogen dioxide and aerosols that affect air quality.