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 April 23 IFRAME: [2]https://www.youtube.com/embed/zIqG42AD4Gw?rel=0 Flying Over the Earth at Night II Video Credit: [3]NASA, [4]Gateway to Astronaut Photography, [5]ISS Expedition 53; Music: [6]The Low Seas (The 126ers) Explanation: Recorded during 2017, timelapse sequences from the International Space Station are compiled in this [7]serene video of planet Earth at Night. Fans of low Earth orbit can start by enjoying the view as green and red aurora borealis [8]slather up the sky. The night scene tracks from northwest to southeast across North America, toward the Gulf of Mexico and the Florida coast. A second sequence follows European city lights, crosses the Mediterranean Sea, and passes over a bright Nile river in northern Africa. Seen from the orbital outpost, erratic flashes of lightning appear in thunder storms below and stars rise above the planet's curved horizon through a faint [9]atmospheric airglow. Of course, from home you can always check out the [10]vital signs of Planet Earth Now. Celebrate: [11]Earth Day Tomorrow's picture: light-weekend __________________________________________________________________ [12]< | [13]Archive | [14]Submissions | [15]Index | [16]Search | [17]Calendar | [18]RSS | [19]Education | [20]About APOD | [21]Discuss | [22]> __________________________________________________________________ Authors & editors: [23]Robert Nemiroff ([24]MTU) & [25]Jerry Bonnell ([26]UMCP) NASA Official: Phillip Newman [27]Specific rights apply. [28]NASA Web Privacy Policy and Important Notices A service of: [29]ASD at [30]NASA / [31]GSFC & [32]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://www.youtube.com/embed/zIqG42AD4Gw?rel=0 3. https://www.nasa.gov/ 4. https://eol.jsc.nasa.gov/ 5. https://www.nasa.gov/mission_pages/station/expeditions/expedition53/index.html 6. https://www.youtube.com/watch?v=BCh90tfSTgA 7. https://eol.jsc.nasa.gov/BeyondThePhotography/CrewEarthObservationsVideos/ 8. https://apod.nasa.gov/apod/ap210114.html 9. https://apod.nasa.gov/apod/ap210418.html 10. https://climate.nasa.gov/earth-now/#/vitalsign?vitalsign=satellites&altid=0&animating=f&start=&end= 11. https://www.nasa.gov/earth-day-2021 12. https://apod.nasa.gov/apod/ap210422.html 13. https://apod.nasa.gov/apod/archivepix.html 14. https://apod.nasa.gov/apod/lib/apsubmit2015.html 15. https://apod.nasa.gov/apod/lib/aptree.html 16. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 17. https://apod.nasa.gov/apod/calendar/allyears.html 18. https://apod.nasa.gov/apod.rss 19. https://apod.nasa.gov/apod/lib/edlinks.html 20. https://apod.nasa.gov/apod/lib/about_apod.html 21. http://asterisk.apod.com/discuss_apod.php?date=210423 22. https://apod.nasa.gov/apod/ap210424.html 23. http://www.phy.mtu.edu/faculty/Nemiroff.html 24. http://www.phy.mtu.edu/ 25. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 26. http://www.astro.umd.edu/ 27. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 28. https://www.nasa.gov/about/highlights/HP_Privacy.html 29. https://astrophysics.gsfc.nasa.gov/ 30. https://www.nasa.gov/ 31. https://www.nasa.gov/centers/goddard/ 32. http://www.mtu.edu/