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 June 9
   [2]An illustration is shown which is a decision tree for identifying a
    light that might be seen in the sky. The background is gray, and the
    text is black in red-lined boxes. 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? The answer to one of
   humanity's more common questions may emerge 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 glare 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]Italian, [15]German, [16]Latvian, [17]Persian,
                  [18]Polish, [19]Spanish, and [20]Turkish
                        Tomorrow's picture: big lion
     __________________________________________________________________

      [21]< | [22]Archive | [23]Submissions | [24]Index | [25]Search |
   [26]Calendar | [27]RSS | [28]Education | [29]About APOD | [30]Discuss |
                                    [31]>
     __________________________________________________________________

    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/2406/astronomy101_hk_960.jpg
   3. http://www.leagueoflostcauses.com/
   4. https://apod.nasa.gov/apod/ap200624.html
   5. https://apod.nasa.gov/apod/ap080604.html
   6. https://darksky.org/what-we-do/international-dark-sky-places/
   7. https://apod.nasa.gov/apod/ap210317.html
   8. https://apod.nasa.gov/apod/ap180709.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://lacuriosona.blogspot.it/2014/06/come-identificare-quella-luce-nel-cielo.html
  15. https://apod.nasa.gov/apod/image/2406/astronomy101_hk_960_deutsche_Khosravinezhad.jpg
  16. http://www.starspace.lv/lv/index/nasa-dienas-attels/kas-ta-par-gaisminu-debesis-09062014.html
  17. https://apod.nasa.gov/apod/image/2406/astronomy101_hk_960_Persian_Rauf_Mostafazade.jpg
  18. http://www.leagueoflostcauses.com/blog/2014/6/astronomy-fans-are-awesome
  19. https://www.leagueoflostcauses.com/blog/2014/6/astronomy-fans-are-awesome
  20. https://twitter.com/takatastronomi/status/1086336722307289088?s=20
  21. https://apod.nasa.gov/apod/ap240608.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=240609
  31. https://apod.nasa.gov/apod/ap240610.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/