                        Astronomy Picture of the Day

    Discover the cosmos! Each day a different image or photograph of our
      fascinating universe is featured, along with a brief explanation
                    written by a professional astronomer.

                               2023 November 8
    A deep space image showing many galaxies, some of which are seen in a
    central bar running nearly horizontally across the image. Please see
               the explanation for more detailed information.

                     Perseus Galaxy Cluster from Euclid
        Image Credit & License: ESA, Euclid, Euclid Consortium, NASA;
      Processing: Jean-Charles Cuillandre (CEA Paris-Saclay) & Giovanni
                   Anselmi; Text: Jean-Charles Cuillandre

   Explanation: There's a new space telescope in the sky: Euclid. Equipped
   with two large panoramic cameras, Euclid captures light from the
   visible to the near-infrared. It took five hours of observing for
   Euclid's 1.2-meter diameter primary mirror to capture, through its
   sharp optics, the 1000+ galaxies in the Perseus cluster, which lies 250
   million light years away. More than 100,000 galaxies are visible in the
   background, some as far away as 10 billion light years. The
   revolutionary nature of Euclid lies in the combination of its wide
   field of view (twice the area of the full moon), its high angular
   resolution (thanks to its 620 Megapixel camera), and its infrared
   vision, which captures both images and spectra. Euclid's initial
   surveys, covering a third of the sky and recording over 2 billion
   galaxies, will enable a study of how dark matter and dark energy have
   shaped our universe.

                           Tomorrow's picture: M1
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       Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
            NASA Official: Phillip Newman Specific rights apply.
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                           NASA Science Activation
                             & Michigan Tech. U.

