Euclid, Mapping the geometry of the dark Universe

Mission Overview

Euclid is a European Space Agency (ESA) mission designed to accurately measure the expansion history of the Universe and the growth of cosmic structures. The Euclid instruments are provided by the ESA member states, with NASA contributing to the NISP (near-infrared spectrometer and imaging photometer). The mission will carry out a large-area optical and near-infrared imaging survey and a spectroscopic survey in the wavelength range 1.1- 2.0 microns. Euclid will constrain Dark Energy, General Relativity, Dark Matter, and the initial conditions of the Universe with unprecedented accuracy.

Although Euclid has been optimized for Dark Energy surveys, the data it gathers will enable unprecedented advances across a range of astrophysics topics. Euclid will deliver high-quality morphologies, masses, and star-formation rates for billions of galaxies out to z~2, over the entire extragalactic sky. In addition, it will provide vital information on objects in our own Solar System, probe the history of the Milky Way halo, and determine the contribution of the light of the first stars to the IR background fluctuations. › Learn more


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Artist's impression of EuclidArtist's impression of Euclid
Artist's impression of Euclid. Euclid will make unprecedented measurements of the properties of dark energy with visible and near-infrared instruments using a 1.2-m telescope, operating at the Earth-Sun L2 point.