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 21
   [2]The buildings of a city are seen past a dark waterway. Over the city
   are some dark clouds and above that, blue sky. In the blue sky, partly
      obscured by some of the clouds, is a comet with a very long tail,
       running from the middle to the top of the frame. Please see the
                 explanation for more detailed information.

                         Comet ATLAS over Brasília
                      Image Credit: [3]Frederico Danin

   Explanation: What's that in the sky? Above the city, above most clouds,
   far in the distance: it's a comet. [4]Pictured, the impressive tail of
   Comet [5]C/2024 G3 (ATLAS) was imaged from [6]Brasília, [7]Brazil four
   days ago. Last week the evolving [8]comet rounded the Sun well inside
   the orbit of planet Mercury, going so close there was early concern
   that it might [9]break up -- and [10]recent evidence that it really
   did. At one point near perihelion, [11]Comet ATLAS was so bright that
   sightings were even reported [12]during the day -- over the bright sky
   near the [13]Sun -- by [14]careful observers. Over the past few days,
   [15]Comet ATLAS has developed a [16]long tail that has been partly
   visible with unaided eyes after sunset, most notably in [17]Earth's
   southern hemisphere.

                    Growing Gallery: [18]Comet ATLAS (G3)
                        Tomorrow's picture: up north
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [30]Robert Nemiroff ([31]MTU) & [32]Jerry Bonnell
                                 ([33]UMCP)
          NASA Official: Amber Straughn [34]Specific rights apply.
            [35]NASA Web Privacy, [36]Accessibility, [37]Notices;
                A service of: [38]ASD at [39]NASA / [40]GSFC,
                         [41]NASA Science Activation
                           & [42]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2501/CometATLAS_Danin_1080.jpg
   3. https://www.instagram.com/freddanin/
   4. https://www.instagram.com/p/DE-ySI9vNJR/
   5. https://en.wikipedia.org/wiki/C/2024_G3_(ATLAS)
   6. https://youtu.be/X-FXTAakciw
   7. https://en.wikipedia.org/wiki/Brazil
   8. https://apod.nasa.gov/apod/ap250120.html
   9. https://apod.nasa.gov/apod/ap230903.html
  10. https://spaceweather.com/archive.php?view=1&day=20&month=01&year=2025
  11. https://skyandtelescope.org/astronomy-news/grab-your-binoculars-for-comet-atlass-brief-sunset-show/
  12. https://media.istockphoto.com/id/1255198816/photo/cat-wearing-sunglasses-outdoors.jpg?s=612x612&w=0&k=20&c=nqyNEvky_3JQRzPVYUsR_ChfSYJb4BscZ74XiaVSLXw=
  13. https://science.nasa.gov/sun/
  14. https://science.nasa.gov/eclipses/future-eclipses/eclipse-2024/safety/
  15. https://theskylive.com/c2024g3-info
  16. https://apod.nasa.gov/apod/ap241007.html
  17. https://www.timeanddate.com/geography/southern-northern-hemisphere.html
  18. https://www.facebook.com/media/set/?set=a.600449002683681&type=3
  19. https://apod.nasa.gov/apod/ap250120.html
  20. https://apod.nasa.gov/apod/archivepix.html
  21. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  22. https://apod.nasa.gov/apod/lib/aptree.html
  23. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  24. https://apod.nasa.gov/apod/calendar/allyears.html
  25. https://apod.com/feed.rss
  26. https://apod.nasa.gov/apod/lib/edlinks.html
  27. https://apod.nasa.gov/apod/lib/about_apod.html
  28. https://asterisk.apod.com/discuss_apod.php?date=250121
  29. https://apod.nasa.gov/apod/ap250122.html
  30. http://www.phy.mtu.edu/faculty/Nemiroff.html
  31. http://www.phy.mtu.edu/
  32. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  33. http://www.astro.umd.edu/
  34. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  35. https://www.nasa.gov/about/highlights/HP_Privacy.html
  36. https://www.nasa.gov/general/accessibility/
  37. https://www.nasa.gov/privacy/
  38. https://astrophysics.gsfc.nasa.gov/
  39. https://www.nasa.gov/
  40. https://www.nasa.gov/centers/goddard/
  41. https://science.nasa.gov/learners
  42. http://www.mtu.edu/