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 December 10 [2]See Explanation. Clicking on the picture will download the highest resolution version available. Eclipse on a Polar Day Image Credit & [3]Copyright: [4]Stephanie Ziyi Ye Explanation: [5]During polar day, in Arctic and Antarctic summer, the Sun stays above the horizon for periods of 24 hours or more. Recorded on December 4, this [6]fisheye timelapse image tracks the Sun in multiple frames as it completes a circle in the summer sky above Union Glacier, Antarctica. Of course on that date, [7]Union Glacier's sky did grow dark even though the Sun was above the horizon. Captured during the brief period of totality, [8]an eclipsed Sun is at bottom center of the composite view. Near the edge of the total eclipse path across planet Earth, [9]the Moon's shadow darkens [10]the sky above. Tomorrow's picture: light-weekend __________________________________________________________________ [11]< | [12]Archive | [13]Submissions | [14]Index | [15]Search | [16]Calendar | [17]RSS | [18]Education | [19]About APOD | [20]Discuss | [21]> __________________________________________________________________ Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell ([25]UMCP) NASA Official: Phillip Newman [26]Specific rights apply. [27]NASA Web Privacy Policy and Important Notices A service of: [28]ASD at [29]NASA / [30]GSFC & [31]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2112/Eclipseclock-final2.JPG 3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 4. https://www.facebook.com/stephanieyeziyi/ 5. https://www.timeanddate.com/astronomy/midnight-sun.html 6. https://www.facebook.com/stephanieyeziyi/photos/a.599207167208884/1289033798226214/?type=3&theater 7. https://www.youtube.com/watch?v=K77Vm22oxi8 8. https://apod.nasa.gov/apod/ap211209.html 9. https://earthobservatory.nasa.gov/images/149174/antarctica-eclipsed 10. https://apod.nasa.gov/apod/ap211205.html 11. https://apod.nasa.gov/apod/ap211209.html 12. https://apod.nasa.gov/apod/archivepix.html 13. https://apod.nasa.gov/apod/lib/apsubmit2015.html 14. https://apod.nasa.gov/apod/lib/aptree.html 15. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 16. https://apod.nasa.gov/apod/calendar/allyears.html 17. https://apod.nasa.gov/apod.rss 18. https://apod.nasa.gov/apod/lib/edlinks.html 19. https://apod.nasa.gov/apod/lib/about_apod.html 20. http://asterisk.apod.com/discuss_apod.php?date=211210 21. https://apod.nasa.gov/apod/ap211211.html 22. http://www.phy.mtu.edu/faculty/Nemiroff.html 23. http://www.phy.mtu.edu/ 24. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 25. http://www.astro.umd.edu/ 26. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 27. https://www.nasa.gov/about/highlights/HP_Privacy.html 28. https://astrophysics.gsfc.nasa.gov/ 29. https://www.nasa.gov/ 30. https://www.nasa.gov/centers/goddard/ 31. http://www.mtu.edu/