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 April 5
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                               Rubin's Galaxy
    Image Credit: [3]NASA, [4]ESA, B. Holwerda (University of Louisville)

   Explanation: [5]In this Hubble Space Telescope image the bright, spiky
   stars lie in the foreground toward the heroic northern constellation
   Perseus and well within our own Milky Way galaxy. In sharp focus beyond
   is [6]UGC 2885, a giant spiral galaxy about 232 million light-years
   distant. Some 800,000 light-years across compared to the Milky Way's
   diameter of 100,000 light-years or so, it has around 1 trillion stars.
   That's about 10 times as many stars as the Milky Way. [7]Part of an
   investigation to understand how galaxies can grow to such enormous
   sizes, UGC 2885 was also part of [8]An Interesting Voyage and
   astronomer Vera Rubin's pioneering study of the rotation of spiral
   galaxies. Her work was the first to convincingly demonstrate the
   dominating presence of [9]dark matter in our universe.

                        Tomorrow's picture: methalox
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    Authors & editors: [21]Robert Nemiroff ([22]MTU) & [23]Jerry Bonnell
                                 ([24]UMCP)
          NASA Official: Phillip Newman [25]Specific rights apply.
              [26]NASA Web Privacy Policy and Important Notices
                A service of: [27]ASD at [28]NASA / [29]GSFC,
                         [30]NASA Science Activation
                           & [31]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2304/RubinsGalaxy_hst2000.jpg
   3. https://www.nasa.gov/
   4. https://www.spacetelescope.org/
   5. https://hubblesite.org/contents/media/images/2020/01/4615-Image
   6. https://ui.adsabs.harvard.edu/abs/1980ApJ...238..471R/abstract
   7. https://ui.adsabs.harvard.edu/abs/2017hst..prop15107H/abstract
   8. https://www.annualreviews.org/doi/full/10.1146/annurev-astro-081710-102545
   9. https://www.space.com/vera-rubin.html
  10. https://apod.nasa.gov/apod/ap230404.html
  11. https://apod.nasa.gov/apod/archivepix.html
  12. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  13. https://apod.nasa.gov/apod/lib/aptree.html
  14. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  15. https://apod.nasa.gov/apod/calendar/allyears.html
  16. https://apod.nasa.gov/apod.rss
  17. https://apod.nasa.gov/apod/lib/edlinks.html
  18. https://apod.nasa.gov/apod/lib/about_apod.html
  19. http://asterisk.apod.com/discuss_apod.php?date=230405
  20. https://apod.nasa.gov/apod/ap230406.html
  21. http://www.phy.mtu.edu/faculty/Nemiroff.html
  22. http://www.phy.mtu.edu/
  23. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  24. http://www.astro.umd.edu/
  25. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  26. https://www.nasa.gov/about/highlights/HP_Privacy.html
  27. https://astrophysics.gsfc.nasa.gov/
  28. https://www.nasa.gov/
  29. https://www.nasa.gov/centers/goddard/
  30. https://science.nasa.gov/learners
  31. http://www.mtu.edu/