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. 2024 June 3 [2]See Explanation. Clicking on the picture will download the highest resolution version available. NGC 2403 in Camelopardalis Image Credit & [3]Copyright: [4](Team F.A.C.T.) Lilian Lbt - Cyrille Malo - Maxime Martin - Clément Daniel - Paul Grasset - Louis Leroux-Géré Explanation: Magnificent island universe [5]NGC 2403 stands within the boundaries of the long-necked constellation [6]Camelopardalis. Some 10 million light-years distant and about 50,000 light-years across, the spiral galaxy also seems to have more than its fair share of giant star forming [7]HII regions, marked by the telltale reddish glow of atomic hydrogen gas. The giant HII regions are energized by clusters of hot, massive stars that explode as [8]bright supernovae at the end of their short and furious lives. A member of the M81 group of galaxies, NGC 2403 closely resembles a galaxy in our own local galaxy group with an abundance of star forming regions, M33, the [9]Triangulum Galaxy. [10]Spiky in appearance, bright stars in [11]this portrait of NGC 2403 are in the foreground, within our own Milky Way. Also in the foreground of the deep, wide-field, telescopic image are the Milky Way's dim and dusty interstellar clouds also known as [12]galactic cirrus or integrated flux nebulae. But faint features that seem to extend from [13]NGC 2403 itself are likely tidal stellar streams drawn out by gravitational interactions with neighboring galaxies. Tomorrow's picture: tail tales __________________________________________________________________ [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: Amber Straughn [29]Specific rights apply. [30]NASA Web Privacy, [31]Accessibility Notices A service of: [32]ASD at [33]NASA / [34]GSFC, [35]NASA Science Activation & [36]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2405/NGC2403-LRGB+Ha+Oiii-v25-f.jpg 3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 4. https://www.astrobin.com/users/fact/ 5. http://messier.seds.org/xtra/ngc/n2403.html 6. http://en.wikipedia.org/wiki/Camelopardalis 7. http://en.wikipedia.org/wiki/H_II_region 8. https://hubblesite.org/contents/news-releases/2004/news-2004-23.html 9. https://apod.nasa.gov/apod/ap131226.html 10. https://apod.nasa.gov/apod/ap121013.html 11. http://www.astrobin.com/2ve5vn/ 12. https://apod.nasa.gov/apod/ap230721.html 13. https://arxiv.org/abs/2301.13526 14. https://apod.nasa.gov/apod/ap240602.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=240603 24. https://apod.nasa.gov/apod/ap240604.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://www.nasa.gov/general/accessibility/ 32. https://astrophysics.gsfc.nasa.gov/ 33. https://www.nasa.gov/ 34. https://www.nasa.gov/centers/goddard/ 35. https://science.nasa.gov/learners 36. http://www.mtu.edu/