NASA | JPL-Caltech | Euclid | 2019 Jun 12
Three extremely dark patches of the sky have been selected for in-depth observations by the European Space Agency's Euclid mission. Researchers will probe these "Euclid Deep Fields" for faint and distant objects in the universe. The positions of the deep fields - one in the Northern Hemisphere and two in the Southern Hemisphere - were announced on June 4, 2019, during the annual Euclid Consortium meeting in Helsinki. ...
Scheduled to launch in 2022, Euclid will survey a significant portion of the sky and image billions of galaxies across the universe in order to provide insights into the nature of two outstanding cosmic mysteries: dark matter and dark energy. Though these phenomena are ordinarily difficult to detect, Euclid will study them using two methods. The first is by observing the evolution of how galaxies have clustered together over the past 10 billion years. The second is by observing the distortion of galaxy images, an effect called gravitational lensing, due to the presence of "ordinary matter" (which includes things like stars and planets) and dark matter intervening between these distant galaxies and us. ...
The Euclid Deep Field North overlaps with a deep field surveyed by NASA's Spitzer Space Telescope, which observes far-infrared light. Meanwhile, the Euclid Deep Field Fornax, located in the Southern Hemisphere, encompasses the Chandra Deep Field South, which has been extensively surveyed in the past couple of decades by NASA's Chandra and ESA's XMM-Newton X-ray observatories, as well as by the NASA-ESA Hubble Space Telescope (which observed visible, infrared and ultraviolet light) and major ground-based telescopes. ...
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