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 August 12
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                         Ghirigori - Star Scribbles
                 Image Credit & [3]Copyright: [4]Paolo Palma

   Explanation: It's fun to scribble on the [5]canvas of the sky. You can
   use a creative photographic technique to cause the light of point-like
   stars to dance across a digital image by tapping lightly on the
   telescope while making an exposure. The result will be a squiggly line
   traced by the star (or two squiggles traced by binary stars) that can
   reveal the star's color. [6]Colorful lines, dubbed Ghirigori, made from
   stars found in the northern sky constellations Bootes, Corona Borealis,
   Ophiucus, and Coma Berenices, are captured in this artistic mosaic. The
   25 stars creating the varied and colorful squiggles are identified
   around the border. Of course, temperature determines [7]the color of a
   star. While whitish stars tend to be close to the Sun's temperature,
   stars with bluer hues are hotter, and yellow and red colors are cooler
   [8]than the Sun.

                   Weekend Watch: [9]Perseid Meteor Shower
                  Tomorrow's picture: a tip of the sombrero
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    Authors & editors: [21]Robert Nemiroff ([22]MTU) & [23]Jerry Bonnell
                                 ([24]UMCP)
          NASA Official: Phillip Newman [25]Specific rights apply.
              [26]NASA Web Privacy Policy and Important Notices
                A service of: [27]ASD at [28]NASA / [29]GSFC
                         [30]NASA Science Activation
                           & [31]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2308/Ghirigori_delBooteCoronaBorealeOfiucoeChiomadiBerenice.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. http://www.unsaltonelcielo.it/
   5. https://apod.nasa.gov/apod/ap230604.html
   6. http://www.unsaltonelcielo.it/i-ghirigori-delle-stelle-piu-luminose-del-cielo/
   7. https://apod.nasa.gov/apod/ap151224.html
   8. https://apod.nasa.gov/apod/ap190613.html
   9. https://blogs.nasa.gov/Watch_the_Skies/2023/08/07/best-meteor-shower-of-the-year-peaks-this-weekend/
  10. https://apod.nasa.gov/apod/ap230811.html
  11. https://apod.nasa.gov/apod/archivepix.html
  12. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  13. https://apod.nasa.gov/apod/lib/aptree.html
  14. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  15. https://apod.nasa.gov/apod/calendar/allyears.html
  16. https://apod.nasa.gov/apod.rss
  17. https://apod.nasa.gov/apod/lib/edlinks.html
  18. https://apod.nasa.gov/apod/lib/about_apod.html
  19. http://asterisk.apod.com/discuss_apod.php?date=230812
  20. https://apod.nasa.gov/apod/ap230813.html
  21. http://www.phy.mtu.edu/faculty/Nemiroff.html
  22. http://www.phy.mtu.edu/
  23. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  24. http://www.astro.umd.edu/
  25. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  26. https://www.nasa.gov/about/highlights/HP_Privacy.html
  27. https://astrophysics.gsfc.nasa.gov/
  28. https://www.nasa.gov/
  29. https://www.nasa.gov/centers/goddard/
  30. https://science.nasa.gov/learners
  31. http://www.mtu.edu/