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From L2, ESA's Euclid mission will begin the detective work of exploring the dark Universe.
For centuries, astronomers have aimed to learn more about the luminous sources of the cosmos: planets, stars, galaxies, and gas. But these objects make up only a small fraction of what the Universe contains. 95% of the Universe appears to be made up of unknown ‘dark’ matter and energy.
ESA's Euclid mission is designed to map the large-scale structure of the Universe and help us understand these mysterious components: dark matter and dark energy.
Euclid will create the largest, most accurate 3D map of the Universe ever. It will observe billions of galaxies out to 10 billion light-years, across more than a third of the sky. With this map, Euclid will reveal how the Universe has expanded and how its structure has evolved over cosmic history. And from this, we can learn more about the role of gravity and the nature of dark energy and dark matter.