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 w
                    ritten by a professional astronomer.

   2021 November 14 [2]The illustration shows a decision tree showing how
    to identify bright lights that you might see in the night sky. Please
             see the explanation for more detailed information.

                    How to Identify that Light in the Sky
     Illustration Credit & Copyright: HK ([3]The League of Lost Causes)

   Explanation: What is that light in the sky? Perhaps one of humanity's
   more common questions, an answer may result from a few quick
   observations. For example -- is it moving or blinking? If so, and if
   you live near a [4]city, the answer is typically an airplane, since
   planes are so numerous and so few stars and [5]satellites are bright
   enough to be seen over the din of [6]artificial city lights. If not,
   and if you live far from a city, that bright light is likely a planet
   such as [7]Venus or [8]Mars -- the former of which is constrained to
   appear near the horizon just before dawn or after dusk. Sometimes the
   low apparent motion of a distant [9]airplane near the horizon makes it
   hard to tell from a [10]bright planet, but even this can usually be
   discerned by the plane's motion over a few minutes. [11]Still unsure?
   The [12]featured chart gives a sometimes-humorous but mostly-accurate
   assessment. Dedicated sky enthusiasts will likely note -- and are
   [13]encouraged to provide -- polite corrections.

   Chart translations: [14]Spanish, [15]Italian, [16]Polish, [17]Kannada,
                 [18]Latvian, [19]Norwegian, and [20]Turkish
                  Tomorrow's picture: volcanic light pillar
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [32]Robert Nemiroff ([33]MTU) & [34]Jerry Bonnell
                                 ([35]UMCP)
          NASA Official: Phillip Newman [36]Specific rights apply.
              [37]NASA Web Privacy Policy and Important Notices
                A service of: [38]ASD at [39]NASA / [40]GSFC
                           & [41]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2111/astronomy101_hk_750.jpg
   3. http://www.leagueoflostcauses.com/
   4. https://apod.nasa.gov/apod/ap200624.html
   5. https://apod.nasa.gov/apod/ap080604.html
   6. https://www.darksky.org/our-work/conservation/idsp/
   7. https://apod.nasa.gov/apod/ap130512.html
   8. https://apod.nasa.gov/apod/ap140402.html
   9. https://apod.nasa.gov/apod/ap190212.html
  10. http://earthsky.org/space/why-dont-planets-twinkle-as-stars-do
  11. http://img.youtube.com/vi/9uuqXXT7VYo/hqdefault.jpg
  12. http://www.leagueoflostcauses.com/blog/2013/08/astronomy-101.html
  13. http://asterisk.apod.com/discuss_apod.php?date=211114
  14. http://www.cosmonoticias.org/como-identificar-esa-luz-en-el-cielo/
  15. http://lacuriosona.blogspot.it/2014/06/come-identificare-quella-luce-nel-cielo.html
  16. http://www.leagueoflostcauses.com/blog/2014/6/astronomy-fans-are-awesome
  17. http://teachersofindia.org/kn/article/%E0%B2%AC%E0%B2%BE%E0%B2%A8%E0%B2%82%E0%B2%97%E0%B2%B3%E0%B2%A6-%E0%B2%AC%E0%B3%86%E0%B2%B3%E0%B2%95%E0%B3%81%E0%B2%97%E0%B2%B3%E0%B3%81
  18. http://www.starspace.lv/lv/index/nasa-dienas-attels/kas-ta-par-gaisminu-debesis-09062014.html
  19. http://www.tv2.no/storm/8917736/
  20. https://twitter.com/takatastronomi/status/1086336722307289088?s=20
  21. https://apod.nasa.gov/apod/ap211113.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.nasa.gov/apod.rss
  28. https://apod.nasa.gov/apod/lib/edlinks.html
  29. https://apod.nasa.gov/apod/lib/about_apod.html
  30. http://asterisk.apod.com/discuss_apod.php?date=211114
  31. https://apod.nasa.gov/apod/ap211115.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://astrophysics.gsfc.nasa.gov/
  39. https://www.nasa.gov/
  40. https://www.nasa.gov/centers/goddard/
  41. http://www.mtu.edu/