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
Go to topicThe main scientific objective of THEMIS (Time History of Events and Macroscale Interactions during Substorms) is to find what triggers magnetic substorms. This phenomenon corresponds to periods of time during which violent changes happen within the Earth's magnetic environment or magnetosphere.
THE five THEMIS scientific satellites (launch February 2007) Florida USA, join the spacefleet of Sun-Earth connection explorers – four from the ESA Cluster mission and two from the CNSA/ESA Double Star mission.