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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This image shows what Euclid looks like on the inside, its optical bench. From this angle, light (white arrow) enters the telescope from below and is redirected by several mirrors to a special component called a dichroic. This component separates the visible light (orange arrow) from the near-infrared light (red arrow). Visible light is reflected and directed to the VISible Instrument (VIS, near the top), and near-infrared light passes through it to the Near-Infrared Spectrometer and Photometer (NISP, on the right).