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 left panel shows a SOHO image of a CME blasting off the sun. To the right is radio spectrum.
Radio bursts are classified as type I to type V and represent various circumstances of eruptions at the Sun. Both radio-quiet and radio-loud CMEs are associated with a type III burst (the vertical feature), which is due to electrons released from the Sun at the lift-off time of CMEs and are not due to CME-driven shocks.
In this image, the radio spectrum shows a type II and type III radio burst, caused by electrons accelerated at the shock driven by the CME.