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.

                               2019 October 28
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                  The Space Station Crosses a Spotless Sun
           Image Credit & Copyright: [3]Eduardo Schaberger Poupeau

   Explanation: Typically, the International Space Station is visible only
   at night. Slowly drifting across the night sky as it orbits the Earth,
   the [4]International Space Station (ISS) can be seen as a [5]bright
   spot about once a month from many locations. [6]The ISS is then visible
   only just after sunset or just before sunrise because it shines by
   reflected sunlight -- once the ISS enters the Earth's shadow, it will
   drop out of sight. The only occasion when the [7]ISS is visible during
   the day is when it [8]passes right in front of the Sun. Then, it passes
   so quickly that only cameras taking short exposures can visually freeze
   the [9]ISS's silhouette onto the background [10]Sun. The [11]featured
   picture did exactly that -- it is actually a series of images taken a
   month ago from [12]Santa Fe, [13]Argentina with perfect timing. This
   image series was later combined with a separate image highlighting the
   texture of the spotless Sun, and an image bringing up the [14]Sun's
   prominences around the edge. At an unusually low [15]Solar Minimum, the
   Sun has gone [16]without sunspots now for most of 2019.

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                        Tomorrow's picture: red robot
     __________________________________________________________________

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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/1910/IssTransit_Poupeau_2406.jpg
   3. https://www.facebook.com/astrofotografiarafaela/
   4. https://www.nasa.gov/mission_pages/station/main/index.html
   5. https://apod.nasa.gov/apod/ap110314.html
   6. https://spotthestation.nasa.gov/faq.cfm
   7. https://apod.nasa.gov/apod/ap160513.html
   8. https://apod.nasa.gov/apod/ap190715.html
   9. https://apod.nasa.gov/apod/ap150912.html
  10. https://solarsystem.nasa.gov/solar-system/sun/overview/
  11. https://www.facebook.com/astrofotografiarafaela/photos/a.407916176064535/1110171379172341/?type=3&theater
  12. https://www.youtube.com/watch?v=ZIpceivSPY0
  13. https://en.wikipedia.org/wiki/Argentina
  14. https://apod.nasa.gov/apod/ap180618.html
  15. https://science.nasa.gov/science-news/news-articles/solar-minimum-is-coming
  16. https://www.spaceweatherlive.com/en/solar-activity/solar-cycle
  17. https://www.instagram.com/astronomypicturesdaily/
  18. https://www.facebook.com/AstronomyPictureOfTheDay
  19. https://www.reddit.com/r/apod
  20. https://twitter.com/apod/
  21. https://apod.nasa.gov/apod/ap191027.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=191028
  31. https://apod.nasa.gov/apod/ap191029.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/