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Euclid mission graphic

Phase: Development

Launch Date: 2020

Mission Project Home Page -

Program(s):Physics of the Cosmos

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Euclid is an ESA-led mission to map the geometry of the dark Universe. Using two cosmological probes (weak lensing and baryonic acoustic oscillations) in a wide-field survey, Euclid will precisely measure the growth of large-scale structure and the expansion history of the Universe. Euclid was selected for implementation as a Medium-class mission in ESA's Cosmic Vision programme in October 2011 and formally adopted in June 2012. NASA joined the mission in 2013. Euclid will be launched in 2020 and will operate from the SunĀ­Earth L2 point at 1.5 million km from Earth. Science and spacecraft operations will be conducted by ESA.

Mission Objectives:

  1. Investigate the properties of dark energy by accurately measuring both the acceleration and the variation of the acceleration at different ages of the Universe
  2. Test the validity of general relativity on cosmic scales
  3. Investigate the nature and properties of dark matter by mapping the 3-dimensional dark matter distribution in the Universe
  4. Refine the initial conditions at the beginning of our Universe, which seed the formation of the cosmic structures we see today

Nearly 1000 scientists from 100 institutes form the Euclid Consortium building the instruments and participating in the scientific harvest of the mission. The consortium comprises scientists from 13 European countries: Austria, Denmark, France, Finland, Germany, Italy, the Netherlands, Norway, Portugal, Romania, Spain, Switzerland and the UK. It also includes a number of U.S. scientists.

Last Updated: April 30, 2013

Related Links
  • ESA's Euclid page -