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 January 7
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                      Space Stations in Low Earth Orbit
                Image Credit & [3]Copyright: [4]Zarcos Palma

   Explanation: On January 3, two space stations already illuminated by
   sunlight in low Earth orbit crossed this dark predawn sky. Moving west
   to east (left to right) across the composited timelapse image
   [5]China's Tiangong Space Station traced the upper trail captured more
   than an hour before the local sunrise. Seen against a starry background
   [6]Tiangong passes just below the inverted Big Dipper asterism of Ursa
   Major near the peak of its bright arc, and above north pole star
   Polaris. But less than five minutes before, the [7]International Space
   Station had traced its own sunlit streak across the dark sky. [8]Its
   trail begins just above the W-shape outlined by the bright stars of
   Cassiopeia near the northern horizon. The dramatic foreground spans an
   abandoned mine at Achada do Gamo in southeastern Portugal.

                   Tomorrow's picture: where you come from
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    Authors & editors: [20]Robert Nemiroff ([21]MTU) & [22]Jerry Bonnell
                                 ([23]UMCP)
          NASA Official: Phillip Newman [24]Specific rights apply.
              [25]NASA Web Privacy Policy and Important Notices
                A service of: [26]ASD at [27]NASA / [28]GSFC,
                         [29]NASA Science Activation
                           & [30]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2301/ISS_TIANHE_FINAL_4_APOD.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. mailto:%20firstname.lastname%20[at]%20gmail
   5. https://en.wikipedia.org/wiki/Tiangong_space_station
   6. https://www.astroviewer.net/iss/en/observation-css.php
   7. https://www.nasa.gov/mission_pages/station/main/index.html
   8. https://spotthestation.nasa.gov/
   9. https://apod.nasa.gov/apod/ap230106.html
  10. https://apod.nasa.gov/apod/archivepix.html
  11. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  12. https://apod.nasa.gov/apod/lib/aptree.html
  13. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  14. https://apod.nasa.gov/apod/calendar/allyears.html
  15. https://apod.nasa.gov/apod.rss
  16. https://apod.nasa.gov/apod/lib/edlinks.html
  17. https://apod.nasa.gov/apod/lib/about_apod.html
  18. http://asterisk.apod.com/discuss_apod.php?date=230107
  19. https://apod.nasa.gov/apod/ap230108.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. https://apod.nasa.gov/apod/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. https://science.nasa.gov/learners
  30. http://www.mtu.edu/