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 February 21
    [2]A comet with a green head and extended tails is seen above a high
   water fall. In the night sky field just above the falls, an orange dot
    -- the star Kochab -- is visible. Please see the explanation for more
                            detailed information.

                        Comet ZTF over Yosemite Falls
                  Image Credit & Copyright: [3]Tara Mostofi

   Explanation: They are both falling. The water in [4]Yosemite Falls,
   [5]California, [6]USA, is falling toward the Earth. [7]Comet ZTF is
   falling toward the [8]Sun. This double cosmic cascade was captured late
   last month as fading [9]Comet C/2022 E3 (ZTF) had just passed its
   closest to planet Earth. The orange star just over the falls is
   [10]Kochab. With the exception of a brief encounter with a [11]black
   bear, the [12]featured image was a [13]well-planned composite of a
   moonlit-foreground and long-duration background exposures - all
   designed to reconstruct a deep version of an actual single sight.
   Although [14]Comet ZTF is [15]now fading as it glides back to the outer
   [16]Solar System, its path is [17]determined by gravity and so it can
   be considered to still be falling toward the Sun -- but backwards.

             Comet ZTF Gallery: [18]Notable Submissions to APOD
                 Tomorrow's picture: a surprisingly busy sun
     __________________________________________________________________

      [19]< | [20]Archive | [21]Submissions | [22]Index | [23]Search |
   [24]Calendar | [25]RSS | [26]Education | [27]About APOD | [28]Discuss |
                                    [29]>
     __________________________________________________________________

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

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2302/CometZtfYosemite_Mostofi_1639.jpg
   3. https://www.instagram.com/taramoonhunter/
   4. https://youtu.be/2x80TEw45Gs
   5. https://en.wikipedia.org/wiki/California
   6. https://en.wikipedia.org/wiki/United_States
   7. https://www.facebook.com/media/set/?set=a.172146088847310&type=3
   8. https://solarsystem.nasa.gov/solar-system/sun/in-depth/
   9. https://en.wikipedia.org/wiki/C/2022_E3_(ZTF)
  10. https://en.wikipedia.org/wiki/Beta_Ursae_Minoris
  11. https://bear.org/how-dangerous-are-black-bears/
  12. https://www.flickr.com/photos/84642732@N02/52685564588/
  13. https://d1hfln2sfez66z.cloudfront.net/11-18-2021/t_9bb7158ef7834e80b0793c26fdf6b8d5_name_DogPhone_could_offer_dogs_the_ability_to_619676d229f511256af6ffc3_1_Nov_18_2021_16_25_58_poster.jpg
  14. https://www.newsweek.com/how-see-green-comet-ztf-leaving-solar-system-1778426
  15. https://in-the-sky.org/ephemeris.php?objtxt=CK22E030
  16. https://apod.nasa.gov/apod/ap220911.html
  17. https://apod.nasa.gov/apod/ap220619.html
  18. https://www.facebook.com/media/set/?set=a.172146088847310&type=3
  19. https://apod.nasa.gov/apod/ap230220.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.nasa.gov/apod.rss
  26. https://apod.nasa.gov/apod/lib/edlinks.html
  27. https://apod.nasa.gov/apod/lib/about_apod.html
  28. http://asterisk.apod.com/discuss_apod.php?date=230221
  29. https://apod.nasa.gov/apod/ap230222.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://astrophysics.gsfc.nasa.gov/
  37. https://www.nasa.gov/
  38. https://www.nasa.gov/centers/goddard/
  39. https://science.nasa.gov/learners
  40. http://www.mtu.edu/