﻿ 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 April 25 [2]A dark rectangular building is seen across a green field with colorful aurora, mostly red, seen in the background sky. Past the aurora, the sky is also filled with stars. Please see the explanation for more detailed information. Northern Lights over Southern Europe Image Credit & Copyright: [3]Lorenzo Cordero Explanation: Did you see an aurora over the past two nights? Many people who don't live in Earth's far north did. [4]Reports of aurora came in not only from northern locales in the [5]USA as [6]Alaska, but as far south as [7]Texas and [8]Arizona. A huge auroral oval extended over [9]Europe and [10]Asia, too. [11]Pictured, an impressively [12]red aurora was captured last night near the town of [13]Cáceres in central [14]Spain. Auroras were also reported in [15]parts of southern Spain. The auroras resulted from a strong [16]Coronal Mass Event (CME) that occurred on the Sun a few days ago. Particles from the CME crossed the inner [17]Solar System before colliding with the Earth's [18]magnetosphere. From there, [19]electrons and [20]protons spiraled down the Earth's northern magnetic field lines and collided with oxygen and nitrogen in [21]Earth's atmosphere, causing [22]picturesque auroral glows. Our unusually active Sun may provide future [23]opportunities to see the [24]northern lights in [25]southern skies. Tomorrow's picture: lunar triomuphe __________________________________________________________________ [26]< | [27]Archive | [28]Submissions | [29]Index | [30]Search | [31]Calendar | [32]RSS | [33]Education | [34]About APOD | [35]Discuss | [36]> __________________________________________________________________ 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]NASA Science Activation & [47]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2304/NlightsSeurope_Cordero_5472.jpg 3. https://www.instagram.com/elcielodecaceres/ 4. https://spaceweathergallery2.com/index.php?title=aurora 5. https://en.wikipedia.org/wiki/United_States 6. https://spaceweathergallery2.com/indiv_upload.php?upload_id=195526 7. https://spaceweathergallery2.com/indiv_upload.php?upload_id=195569 8. https://spaceweathergallery2.com/indiv_upload.php?upload_id=195547 9. https://en.wikipedia.org/wiki/Europe 10. https://en.wikipedia.org/wiki/Asia 11. https://www.instagram.com/p/Crb33XXIX7E/ 12. https://www.webexhibits.org/causesofcolor/4D.html 13. https://en.wikipedia.org/wiki/Cáceres,_Spain 14. https://en.wikipedia.org/wiki/Spain 15. https://spaceweathergallery2.com/indiv_upload.php?upload_id=195528 16. https://www.nasa.gov/content/goddard/what-is-a-coronal-mass-ejection 17. https://solarsystem.nasa.gov/solar-system/our-solar-system/in-depth/ 18. https://science.nasa.gov/heliophysics/focus-areas/magnetosphere-ionosphere 19. https://en.wikipedia.org/wiki/Electron 20. https://en.wikipedia.org/wiki/Proton 21. https://spaceplace.nasa.gov/atmosphere/en/ 22. https://apod.nasa.gov/apod/ap230419.html 23. https://apod.nasa.gov/apod/ap230122.html 24. https://apod.nasa.gov/apod/ap180621.html 25. https://apod.nasa.gov/apod/ap031113.html 26. https://apod.nasa.gov/apod/ap230424.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. https://asterisk.apod.com/discuss_apod.php?date=230425 36. https://apod.nasa.gov/apod/ap230426.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. https://science.nasa.gov/learners 47. http://www.mtu.edu/