ż

                        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.

                                 2021 May 4
      [2]A picture of the International Space Station crossing the Sun.
          Please see the explanation for more detailed information.

                    Space Station, Solar Prominences, Sun
                 Image Credit & Copyright: [3]Mehmet Ergušn

   Explanation: [4]That's no sunspot. It's the [5]International Space
   Station (ISS) caught passing in front of the Sun. [6]Sunspots,
   individually, have a dark central [7]umbra, a lighter surrounding
   [8]penumbra, and [9]no Dragon capsules attached. By contrast, the
   [10]ISS is a complex and multi-spired mechanism, one of the largest and
   most [11]complicated spacecraft ever created by [12]humanity. Also,
   [13]sunspots circle the [14]Sun, whereas the [15]ISS orbits the
   [16]Earth. Transiting the Sun is not very unusual for the [17]ISS,
   which orbits the Earth about every 90 minutes, but getting one's
   location, timing and equipment just right for a [18]great image is
   rare. The [19]featured picture combined three images all taken from the
   same location and at nearly the same time. One image -- overexposed --
   captured the faint [20]prominences seen across the top of the Sun, a
   second image -- underexposed -- captured the complex texture of the
   [21]Sun's chromosphere, while the third image -- the hardest to get --
   captured the space station as it [22]shot across the Sun in a fraction
   of a second. [23]Close inspection of the space station's [24]silhouette
   even reveals a docked [25]Dragon Crew capsule.

                      Tomorrow's picture: all sky STEVE
     __________________________________________________________________

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    Authors & editors: [37]Robert Nemiroff ([38]MTU) & [39]Jerry Bonnell
                                 ([40]UMCP)
          NASA Official: Phillip Newman [41]Specific rights apply.
              [42]NASA Web Privacy Policy and Important Notices
                A service of: [43]ASD at [44]NASA / [45]GSFC
                           & [46]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2105/IssSun_Ergun_1752.jpg
   3. https://www.mehmet-erguen.com/ueber-mich
   4. https://www.youtube.com/watch?v=8Nho44lGVV8
   5. https://apod.nasa.gov/apod/ap160418.html
   6. https://apod.nasa.gov/apod/ap051106.html
   7. https://en.wikipedia.org/wiki/Sunspot
   8. https://apod.nasa.gov/apod/ap060909.html
   9. https://www.petsworld.in/blog/wp-content/uploads/2017/01/Pic-2.jpeg
  10. https://www.nasa.gov/mission_pages/station/main/index.html
  11. https://www.nytimes.com/2020/11/02/science/international-space-station-20-anniversary.html
  12. https://apod.nasa.gov/apod/ap190818.html
  13. https://apod.nasa.gov/apod/ap141022.html
  14. https://solarsystem.nasa.gov/solar-system/sun/overview/
  15. https://apod.nasa.gov/apod/ap161105.html
  16. https://apod.nasa.gov/apod/ap070325.html
  17. https://apod.nasa.gov/apod/ap050729.html
  18. https://apod.nasa.gov/apod/ap170828.html
  19. https://www.instagram.com/p/COGbC01guiS/
  20. https://apod.nasa.gov/apod/ap160306.html
  21. https://nso.edu/for-public/sun-science/chromosphere/
  22. https://apod.nasa.gov/apod/image/2105/Chromosphere.mp4
  23. https://buenavet.com/wp-content/uploads/2018/01/Cat_Fish_Bowl.jpg
  24. https://apod.nasa.gov/apod/ap140803.html
  25. https://en.wikipedia.org/wiki/SpaceX_Dragon_2
  26. https://apod.nasa.gov/apod/ap210503.html
  27. https://apod.nasa.gov/apod/archivepix.html
  28. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  29. https://apod.nasa.gov/apod/lib/aptree.html
  30. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  31. https://apod.nasa.gov/apod/calendar/allyears.html
  32. https://apod.nasa.gov/apod.rss
  33. https://apod.nasa.gov/apod/lib/edlinks.html
  34. https://apod.nasa.gov/apod/lib/about_apod.html
  35. http://asterisk.apod.com/discuss_apod.php?date=210504
  36. https://apod.nasa.gov/apod/ap210505.html
  37. http://www.phy.mtu.edu/faculty/Nemiroff.html
  38. http://www.phy.mtu.edu/
  39. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  40. http://www.astro.umd.edu/
  41. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  42. https://www.nasa.gov/about/highlights/HP_Privacy.html
  43. https://astrophysics.gsfc.nasa.gov/
  44. https://www.nasa.gov/
  45. https://www.nasa.gov/centers/goddard/
  46. http://www.mtu.edu/