Astronomy Picture of the Day

   [1]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 September 12
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                     Galaxy Cluster Abell 370 and Beyond
      Image Credit: [3]NASA, [4]ESA, Jennifer Lotz and the [5]HFF Team
                                 ([6]STScI)

   Explanation: Some 4 billion light-years away, massive galaxy cluster
   Abell 370 is captured in this sharp [7]Hubble Space Telescope snapshot.
   The cluster of galaxies only appears to be dominated by two giant
   elliptical galaxies and infested with faint arcs. In reality, the
   fainter, scattered bluish arcs, along with the [8]dramatic dragon arc
   below and left of center, are images of galaxies that lie far beyond
   Abell 370. About twice as distant, their otherwise undetected light is
   magnified and distorted by the cluster's enormous gravitational mass,
   overwhelmingly dominated by unseen [9]dark matter. Providing a
   [10]tantalizing glimpse of galaxies in the early universe, the effect
   is known as gravitational [11]lensing. A consequence of warped
   [12]spacetime, lensing was predicted by Einstein almost a century ago.
   [13]Far beyond the spiky foreground Milky Way star at lower right,
   Abell 370 is seen toward the constellation Cetus, the Sea Monster. It
   was the last of six galaxy clusters imaged in the [14]Frontier Fields
   project.

                      Tomorrow's picture: partly hidden
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    Authors & editors: [26]Robert Nemiroff ([27]MTU) & [28]Jerry Bonnell
                                 ([29]UMCP)
          NASA Official: Phillip Newman [30]Specific rights apply.
              [31]NASA Web Privacy Policy and Important Notices
                A service of: [32]ASD at [33]NASA / [34]GSFC,
                         [35]NASA Science Activation
                           & [36]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2309/STSCI-HST-abell370_1797x2000.jpg
   3. https://www.nasa.gov/
   4. http://www.spacetelescope.org/
   5. https://frontierfields.org/about/
   6. http://www.stsci.edu/portal/
   7. https://hubblesite.org/contents/media/images/2017/20/4024-Image.html
   8. https://apod.nasa.gov/apod/ap160828.html
   9. https://en.wikipedia.org/wiki/Dark_matter#Galaxy_clusters
  10. http://webbtelescope.org/
  11. https://apod.nasa.gov/apod/ap151127.html
  12. http://www.black-holes.org/
  13. https://hubblesite.org/contents/media/videos/2017/20/953-Video.html
  14. https://frontierfields.org/
  15. https://apod.nasa.gov/apod/ap230911.html
  16. https://apod.nasa.gov/apod/archivepix.html
  17. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  18. https://apod.nasa.gov/apod/lib/aptree.html
  19. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  20. https://apod.nasa.gov/apod/calendar/allyears.html
  21. https://apod.nasa.gov/apod.rss
  22. https://apod.nasa.gov/apod/lib/edlinks.html
  23. https://apod.nasa.gov/apod/lib/about_apod.html
  24. http://asterisk.apod.com/discuss_apod.php?date=230912
  25. https://apod.nasa.gov/apod/ap230913.html
  26. http://www.phy.mtu.edu/faculty/Nemiroff.html
  27. http://www.phy.mtu.edu/
  28. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  29. http://www.astro.umd.edu/
  30. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  31. https://www.nasa.gov/about/highlights/HP_Privacy.html
  32. https://astrophysics.gsfc.nasa.gov/
  33. https://www.nasa.gov/
  34. https://www.nasa.gov/centers/goddard/
  35. https://science.nasa.gov/learners
  36. http://www.mtu.edu/