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. 2019 November 25 [2]See Explanation. Clicking on the picture will download the highest resolution version available. NGC 6995: The Bat Nebula Image Credit & Copyright: [3]Josep Drudis Explanation: Do you see the bat? It haunts [4]this cosmic close-up of the eastern [5]Veil Nebula. [6]The Veil Nebula itself is a large supernova remnant, the expanding debris cloud from the [7]death explosion of a massive star. While the Veil is roughly [8]circular in shape and covers nearly 3 degrees on the sky toward the constellation of the Swan ([9]Cygnus), the Bat Nebula, NGC 6995, spans only 1/2 degree, about the apparent size [10]of the Moon. That [11]translates to 12 light-years at the Veil's estimated distance, a reassuring 1,400 light-years from [12]planet Earth. In the composite of image data recorded through broad and [13]narrow band filters, emission from [14]hydrogen atoms in the remnant is shown in red with strong emission from oxygen and nitrogen atoms shown in hues of blue. Of course, in the western part of the Veil lies another seasonal apparition: [15]the Witch's Broom Nebula. Tomorrow's picture: galaxy-sized ring __________________________________________________________________ [16]< | [17]Archive | [18]Submissions | [19]Index | [20]Search | [21]Calendar | [22]RSS | [23]Education | [24]About APOD | [25]Discuss | [26]> __________________________________________________________________ Authors & editors: [27]Robert Nemiroff ([28]MTU) & [29]Jerry Bonnell ([30]UMCP) NASA Official: Phillip Newman [31]Specific rights apply. [32]NASA Web Privacy Policy and Important Notices A service of: [33]ASD at [34]NASA / [35]GSFC & [36]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/1911/NGC6995_Drudis_3942.jpg 3. http://www.astrodrudis.com/ 4. https://astrodrudis.com/ngc-6995-the-bat-nebula/ 5. https://en.wikipedia.org/wiki/Veil_Nebula 6. https://apod.nasa.gov/apod/ap191031.html 7. https://www.youtube.com/watch?v=OyntBsxoEkA 8. https://www.mathsisfun.com/algebra/trig-interactive-unit-circle.html 9. https://en.wikipedia.org/wiki/Cygnus_(constellation) 10. https://apod.nasa.gov/apod/ap130801.html 11. http://chandra.harvard.edu/photo/scale_distance.html 12. https://www.globe.gov/en 13. https://apod.nasa.gov/apod/ap071102.html 14. https://periodic.lanl.gov/1.shtml 15. https://apod.nasa.gov/apod/ap180408.html 16. https://apod.nasa.gov/apod/ap191124.html 17. https://apod.nasa.gov/apod/archivepix.html 18. https://apod.nasa.gov/apod/lib/apsubmit2015.html 19. https://apod.nasa.gov/apod/lib/aptree.html 20. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 21. https://apod.nasa.gov/apod/calendar/allyears.html 22. https://apod.nasa.gov/apod.rss 23. https://apod.nasa.gov/apod/lib/edlinks.html 24. https://apod.nasa.gov/apod/lib/about_apod.html 25. http://asterisk.apod.com/discuss_apod.php?date=191125 26. https://apod.nasa.gov/apod/ap191126.html 27. http://www.phy.mtu.edu/faculty/Nemiroff.html 28. http://www.phy.mtu.edu/ 29. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 30. http://www.astro.umd.edu/ 31. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 32. https://www.nasa.gov/about/highlights/HP_Privacy.html 33. https://astrophysics.gsfc.nasa.gov/ 34. https://www.nasa.gov/ 35. https://www.nasa.gov/centers/goddard/ 36. http://www.mtu.edu/