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.

                               2025 January 6
   [2]Two spiral galaxies are pictured on the left and right. They galaxy
     on the left is smaller. Both show red lanes of dust in their spiral
       arms. Please see the explanation for more detailed information.

               Colliding Spiral Galaxies from Webb and Hubble
               Image Credit: [3]NASA, [4]ESA, [5]CSA, [6]STScI

   Explanation: Billions of years from now, only one of these two galaxies
   will remain. Until then, spiral [7]galaxies NGC 2207 and IC 2163 will
   slowly pull each other apart, creating [8]tides of matter, sheets of
   [9]shocked gas, lanes of [10]dark dust, bursts of [11]star formation,
   and streams of [12]cast-away stars. The [13]featured image in
   scientifically assigned colors is a composite of [14]Hubble exposures
   in [15]visible light and [16]Webb exposures in [17]infrared light.
   [18]Astronomers predict that NGC 2207, the larger galaxy on the right,
   will eventually incorporate IC 2163, the smaller galaxy on the left. In
   the most [19]recent encounter that about peaked 40 million years ago,
   the smaller galaxy is swinging around counter-clockwise and is now
   [20]slightly behind the larger galaxy. The space between stars is so
   vast that when [21]galaxies collide, the stars in them [22]usually do
   not collide.

              Jigsaw Challenge: [23]Astronomy Puzzle of the Day
                     Tomorrow's picture: double red sky
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [35]Robert Nemiroff ([36]MTU) & [37]Jerry Bonnell
                                 ([38]UMCP)
          NASA Official: Amber Straughn [39]Specific rights apply.
            [40]NASA Web Privacy, [41]Accessibility, [42]Notices;
                A service of: [43]ASD at [44]NASA / [45]GSFC,
                         [46]NASA Science Activation
                           & [47]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2501/CollidingGalaxies_WebbHubble_1877.jpg
   3. https://www.nasa.gov/
   4. https://www.esa.int/
   5. https://www.asc-csa.gc.ca/eng/
   6. https://www.stsci.edu/
   7. http://www.seds.org/messier/galaxy.html
   8. https://en.wikipedia.org/wiki/Tide
   9. https://apod.nasa.gov/apod/ap160522.html
  10. https://apod.nasa.gov/apod/ap220801.html
  11. https://apod.nasa.gov/apod/ap230828.html
  12. https://apod.nasa.gov/apod/ap990327.html
  13. https://hubblesite.org/contents/media/images/2024/136/01J9RRG5672MP4BPRFG31ARSV6
  14. https://science.nasa.gov/mission/hubble/
  15. https://science.nasa.gov/ems/09_visiblelight/
  16. https://science.nasa.gov/mission/webb/
  17. https://science.nasa.gov/ems/07_infraredwaves/
  18. https://ui.adsabs.harvard.edu/abs/2005MNRAS.364...69S/abstract
  19. https://ui.adsabs.harvard.edu/abs/1995ApJ...453..139E/abstract
  20. https://www.reddit.com/r/cats/comments/11mua7z/show_me_your_bonded_kitties/#lightbox
  21. https://apod.nasa.gov/apod/ap130514.html
  22. https://www.wtamu.edu/~cbaird/sq/2024/06/25/does-everything-get-smashed-to-bits-when-two-galaxies-collide/
  23. https://www.scigames.org/apps/webjigsaw2/index.php
  24. https://apod.nasa.gov/apod/ap250105.html
  25. https://apod.nasa.gov/apod/archivepix.html
  26. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  27. https://apod.nasa.gov/apod/lib/aptree.html
  28. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  29. https://apod.nasa.gov/apod/calendar/allyears.html
  30. https://apod.com/feed.rss
  31. https://apod.nasa.gov/apod/lib/edlinks.html
  32. https://apod.nasa.gov/apod/lib/about_apod.html
  33. https://asterisk.apod.com/discuss_apod.php?date=250106
  34. https://apod.nasa.gov/apod/ap250107.html
  35. http://www.phy.mtu.edu/faculty/Nemiroff.html
  36. http://www.phy.mtu.edu/
  37. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  38. http://www.astro.umd.edu/
  39. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  40. https://www.nasa.gov/about/highlights/HP_Privacy.html
  41. https://www.nasa.gov/general/accessibility/
  42. https://www.nasa.gov/privacy/
  43. https://astrophysics.gsfc.nasa.gov/
  44. https://www.nasa.gov/
  45. https://www.nasa.gov/centers/goddard/
  46. https://science.nasa.gov/learners
  47. http://www.mtu.edu/