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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 Medium-class mission, part of ESA’s Cosmic Vision program, to map the geometry of the dark Universe. By conducting a wide-field survey and using two cosmological probes (weak lensing and baryonic acoustic oscillations), Euclid will precisely measure the growth of large-scale structure and the expansion history of the Universe. Euclid was selected by ESA for implementation in October 2011 and NASA joined the mission as a partner in 2013. Euclid is currently in its implementation phase. It will be launched in 2020 and operate from the Sun­Earth L2 point at 1.5 million km ( ~932,000 miles) from Earth. Science and spacecraft operations will be conducted by ESA.

Mission Objectives:

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

More than 1000 scientists from 100 institutes form the Euclid Consortium (EC), which is responsible for 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, the UK, and the US.

For NASA’s contribution to the Euclid partnership, the following activities are underway:

  • More than 50 U.S. scientists are members of the Euclid Science Team that will analyze the data, and make maps of the sky.
  • The near-infrared sensor assembly for the Near Infrared Spectrometer and Photometer (NISP) instrument is being developed, tested, and delivered by NASA to ESA.
  • The Euclid NASA Science Center at IPAC (ENSCI) has been formed to support all segments of US community on Euclid in order to enhance science utilization, and to integrate into Euclid Science Ground System.

Last Updated: July 6, 2015

Related Links
  • ESA's Euclid page -