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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What is the difference between an asteroid and a comet? When does a meteor become a meteorite? And what on Earth is a bolide?
There are a variety of types of small bodies traversing space and scientists have a number of different names for them. This handy infographic illustrates what’s what in the fascinating world of space rocks.