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 22
     [2]A picture of the Sun setting at the end of a long city street is
      shown. Please see the explanation for more detailed information.

                  Chicagohenge: Equinox in an Aligned City
                 Image Credit & Copyright: [3]Anthony Artese

   Explanation: Chicago, in a way, is like a modern [4]Stonehenge. The way
   is east to west, and the time is today. Today, and every [5]equinox,
   the [6]Sun will set exactly to the west, everywhere on [7]Earth.
   Therefore, today in [8]Chicago, the Sun will set directly down the long
   equatorially-aligned [9]grid of streets and buildings, an event dubbed
   [10]#chicagohenge. [11]Featured here is a [12]Chicago Henge picture
   taken during the [13]equinox in mid-September of 2017 looking along
   part of Upper [14]Wacker Drive. [15]Many cities, though, have
   [16]streets or other [17]features that are [18]well-aligned to Earth's
   spin axis. Therefore, quite possibly, your [19]favorite street may also
   run east - west. Tonight at sunset, with a quick glance, you can
   [20]actually find out.

                    Tomorrow's picture: comet approaches
     __________________________________________________________________

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    Authors & editors: [32]Robert Nemiroff ([33]MTU) & [34]Jerry Bonnell
                                 ([35]UMCP)
          NASA Official: Amber Straughn [36]Specific rights apply.
            [37]NASA Web Privacy, [38]Accessibility, [39]Notices;
                A service of: [40]ASD at [41]NASA / [42]GSFC,
                         [43]NASA Science Activation
                           & [44]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2409/Chicagohenge_Artese_1320.jpg
   3. https://x.com/anthony_artese
   4. https://en.wikipedia.org/wiki/Stonehenge
   5. https://apod.nasa.gov/apod/ap210922.html
   6. https://science.nasa.gov/sun/
   7. https://science.nasa.gov/earth/facts/
   8. https://en.wikipedia.org/wiki/Chicago
   9. https://www.domu.com/blog/decoding-the-chicago-street-grid-system
  10. https://twitter.com/search?q=#chicagohenge
  11. https://twitter.com/anthony_artese/status/910309187049148417
  12. http://www.chicagotribune.com/news/ct-viewing-chicagohenge-when-and-how-it-works-20150922s-htmlstory.html
  13. https://blogs.nasa.gov/Watch_the_Skies/tag/equinox/
  14. https://en.wikipedia.org/wiki/Wacker_Drive
  15. https://www.citylab.com/transportation/2016/03/mapping-street-numbering-us-new-york-philadelphia/472809/
  16. https://apod.nasa.gov/apod/ap240319.html
  17. https://apod.nasa.gov/apod/ap170621.html
  18. https://apod.nasa.gov/apod/ap140706.html
  19. http://static.boredpanda.com/blog/wp-content/uploads/2016/01/police-rescue-sloth-cross-highway-ecuador-6.jpg
  20. https://as2.ftcdn.net/v2/jpg/00/34/33/73/1000_F_34337307_NVRxBN6qAPMSzwlLvHk91LZHTnPPemts.jpg
  21. https://apod.nasa.gov/apod/ap240921.html
  22. https://apod.nasa.gov/apod/archivepix.html
  23. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  24. https://apod.nasa.gov/apod/lib/aptree.html
  25. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  26. https://apod.nasa.gov/apod/calendar/allyears.html
  27. https://apod.com/feed.rss
  28. https://apod.nasa.gov/apod/lib/edlinks.html
  29. https://apod.nasa.gov/apod/lib/about_apod.html
  30. https://asterisk.apod.com/discuss_apod.php?date=240922
  31. https://apod.nasa.gov/apod/ap240923.html
  32. http://www.phy.mtu.edu/faculty/Nemiroff.html
  33. http://www.phy.mtu.edu/
  34. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  35. http://www.astro.umd.edu/
  36. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  37. https://www.nasa.gov/about/highlights/HP_Privacy.html
  38. https://www.nasa.gov/general/accessibility/
  39. https://www.nasa.gov/privacy/
  40. https://astrophysics.gsfc.nasa.gov/
  41. https://www.nasa.gov/
  42. https://www.nasa.gov/centers/goddard/
  43. https://science.nasa.gov/learners
  44. http://www.mtu.edu/