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.

                              2024 September 27
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                    Stellar Streams in the Local Universe
               Image Credit: [3]David Martinez Delgado et al.

   Explanation: [4]The twenty galaxies arrayed in these panels are part of
   an ambitious astronomical survey of tidal stellar streams. Each panel
   presents a composite view; a deep, inverted image taken from publicly
   [5]available imaging surveys of a field that surrounds a [6]nearby
   massive galaxy image. The inverted images reveal faint cosmic
   structures, star streams hundreds of thousands of light-years across,
   that result from the gravitational disruption and [7]eventual merger of
   satellite galaxies in the [8]local universe. Such surveys of mergers
   and gravitational tidal interactions between massive galaxies and their
   dwarf satellites are [9]crucial guides for current models of galaxy
   formation and cosmology. Of course, the detection of stellar streams in
   the neighboring Andromeda Galaxy and [10]our own Milky Way also offers
   spectacular evidence for ongoing satellite galaxy disruption within our
   more [11]local galaxy group.

                    Tomorrow's picture: eclipse at sunset
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    Authors & editors: [23]Robert Nemiroff ([24]MTU) & [25]Jerry Bonnell
                                 ([26]UMCP)
          NASA Official: Phillip Newman [27]Specific rights apply.
              [28]NASA Web Privacy Policy and Important Notices
                A service of: [29]ASD at [30]NASA / [31]GSFC,
                         [32]NASA Science Activation
                           & [33]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2409/SSSGreatestHits.png
   3. https://www.aanda.org/articles/aa/abs/2023/03/aa45011-22/aa45011-22.html
   4. https://ui.adsabs.harvard.edu/abs/2023A&A...671A.141M/abstract
   5. https://ui.adsabs.harvard.edu/abs/2019AJ....157..168D/abstract
   6. https://apod.nasa.gov/apod/ap240703.html
   7. https://apod.nasa.gov/apod/ap191116.html
   8. https://www.astro.wisc.edu/research/research-areas/extragalactic-astronomy-and-cosmology/local-universe/
   9. https://arxiv.org/abs/2409.03585
  10. https://apod.nasa.gov/apod/ap130815.html
  11. https://imagine.gsfc.nasa.gov/features/cosmic/local_group_info.html
  12. https://apod.nasa.gov/apod/ap240926.html
  13. https://apod.nasa.gov/apod/archivepix.html
  14. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  15. https://apod.nasa.gov/apod/lib/aptree.html
  16. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  17. https://apod.nasa.gov/apod/calendar/allyears.html
  18. https://apod.nasa.gov/apod.rss
  19. https://apod.nasa.gov/apod/lib/edlinks.html
  20. https://apod.nasa.gov/apod/lib/about_apod.html
  21. http://asterisk.apod.com/discuss_apod.php?date=240927
  22. https://apod.nasa.gov/apod/ap240928.html
  23. http://www.phy.mtu.edu/faculty/Nemiroff.html
  24. http://www.phy.mtu.edu/
  25. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  26. http://www.astro.umd.edu/
  27. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  28. https://www.nasa.gov/about/highlights/HP_Privacy.html
  29. https://astrophysics.gsfc.nasa.gov/
  30. https://www.nasa.gov/
  31. https://www.nasa.gov/centers/goddard/
  32. https://science.nasa.gov/learners
  33. http://www.mtu.edu/