                         Astronomy Picture of the Day

                         Astronomy Picture of the Day

    Discover the cosmos! [1] Each day a different image or photograph of our
 fascinating universe is featured, along with a brief explanation written by a
                           professional astronomer.

                                  2019 May 4
                                      [2]
                        Saturn and the Da Vinci Glow
          Image Credit & Copyright [3] : Tunc Tezel [4] (TWAN [5] )

Explanation: On February 2nd early morning risers saw Saturn near an old Moon
low on the eastern horizon. On that date bright planet, sunlit crescent, and
faint lunar night side were captured in this predawn skyscape from Bursa,
Turkey. Of course the Moon's ashen glow is earthshine [6] , earthlight
reflected from the Moon's night side. A description of earthshine, in terms of
sunlight reflected by Earth's oceans illuminating the Moon's dark surface, was
written over 500 years ago by Leonardo da Vinci [7] . On May 2nd an old Moon
also rose in the predawn twilight. On that date its ashen glow shared the sky
with Venus, the brilliant morning star. May 2nd also marked the 500th
anniversary of Leonardo's [8] death in 1519.

                      Tomorrow's picture: rings and haze

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    Authors & editors: Robert Nemiroff [20] (MTU [21] ) & Jerry Bonnell [22]
                                  (UMCP [23] )
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              A service of: ASD [26]  at NASA [27]  / GSFC [28]
                           & Michigan Tech. U. [29]
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Site notes:
  [1] archivepix.html
  [2] image/1905/20190202tezel.jpg
  [3] lib/about_apod.html#srapply
  [4] http://www.twanight.org/tezel
  [5] http://www.twanight.org/
  [6] https://earthobservatory.nasa.gov/IOTD/ view.php?id=83782
  [7] https://science.nasa.gov/science-news/
science-at-nasa/2005/04oct_leonardo
  [8] https://www.google.com/search?q=leonardo+da+vinci
  [9] ap190503.html
  [10] archivepix.html
  [11] lib/apsubmit2015.html
  [12] lib/aptree.html
  [13] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [14] calendar/allyears.html
  [15] /apod.rss
  [16] lib/edlinks.html
  [17] lib/about_apod.html
  [18] http://asterisk.apod.com/discuss_apod.php?date=190504
  [19] ap190505.html
  [20] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [21] http://www.phy.mtu.edu/
  [22] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [23] http://www.astro.umd.edu/
  [24] lib/about_apod.html#srapply
  [25] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [26] https://astrophysics.gsfc.nasa.gov/
  [27] https://www.nasa.gov/
  [28] https://www.nasa.gov/centers/goddard/
  [29] http://www.mtu.edu/
