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 November 19 [2]See Explanation. Clicking on the picture will download the highest resolution version available. NGC 281: Starless with Stars Image Credit & [3]Copyright: [4]Wido Oerlemans - X-ray: [5]Chandra, Infrared: [6]Spitzer Explanation: In visible light the stars have been removed from this narrow-band image [7]of NGC 281, a star forming region some 10,000 light-years away toward the constellation Cassiopeia. Stars were digitally added back to the resulting [8]starless image though. But instead of using visible light image data, the stars were added with [9]X-ray data (in purple) from the Chandra X-ray Observatory and [10]infrared data (in red) from the Spitzer Space Telescope. The merged [11]multiwavelength view reveals a multitude of stars in the region's embedded star cluster [12]IC 1590. The young stars are normally hidden in visible light images by the natal cloud's gas and obscuring dust. Also known to backyard astro-imagers as the [13]Pacman Nebula for its overall appearance in visible light, NGC 281 is about 80 light-years across. Tomorrow's picture: light-weekend __________________________________________________________________ [14]< | [15]Archive | [16]Submissions | [17]Index | [18]Search | [19]Calendar | [20]RSS | [21]Education | [22]About APOD | [23]Discuss | [24]> __________________________________________________________________ Authors & editors: [25]Robert Nemiroff ([26]MTU) & [27]Jerry Bonnell ([28]UMCP) NASA Official: Phillip Newman [29]Specific rights apply. [30]NASA Web Privacy Policy and Important Notices A service of: [31]ASD at [32]NASA / [33]GSFC & [34]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2111/starless_color.jpg 3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 4. mailto:%20firstnamelastname%20[at]%20hotmail%20[dot] 5. https://chandra.harvard.edu/ 6. https://www.spitzer.caltech.edu/ 7. https://apod.nasa.gov/apod/ap110825.html 8. https://apod.nasa.gov/apod/ap210827.html 9. https://chandra.harvard.edu/photo/2011/ngc281/ 10. https://www.spitzer.caltech.edu/image/sig11-014-living-the-high-life 11. https://science.nasa.gov/ems/01_intro 12. https://arxiv.org/abs/2106.15129 13. https://www.google.com/doodles/30th-anniversary-of-pac-man 14. https://apod.nasa.gov/apod/ap211118.html 15. https://apod.nasa.gov/apod/archivepix.html 16. https://apod.nasa.gov/apod/lib/apsubmit2015.html 17. https://apod.nasa.gov/apod/lib/aptree.html 18. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 19. https://apod.nasa.gov/apod/calendar/allyears.html 20. https://apod.nasa.gov/apod.rss 21. https://apod.nasa.gov/apod/lib/edlinks.html 22. https://apod.nasa.gov/apod/lib/about_apod.html 23. http://asterisk.apod.com/discuss_apod.php?date=211119 24. https://apod.nasa.gov/apod/ap211120.html 25. http://www.phy.mtu.edu/faculty/Nemiroff.html 26. http://www.phy.mtu.edu/ 27. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 28. http://www.astro.umd.edu/ 29. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 30. https://www.nasa.gov/about/highlights/HP_Privacy.html 31. https://astrophysics.gsfc.nasa.gov/ 32. https://www.nasa.gov/ 33. https://www.nasa.gov/centers/goddard/ 34. http://www.mtu.edu/