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 July 23
   [2]A multi-colored nebula is shown that is the expanding remnant of an
    exploded star. The central white and purple colors show X-ray light,
   while the outer red and blue colors show visible light. Please see the
                 explanation for more detailed information.

                    The Crab Nebula from Visible to X-Ray
    Image Credit: [3]NASA, [4]ESA, [5]ASI, [6]Hubble, [7]Chandra, [8]IXPE

   Explanation: What powers the Crab Nebula? A city-sized magnetized
   [9]neutron star spinning around 30 times a second. Known as the
   [10]Crab Pulsar, it is the bright spot in the center of the gaseous
   swirl at the nebula's core. About 10 light-years across, the
   [11]spectacular picture of the [12]Crab Nebula (M1) frames a swirling
   central disk and complex filaments of surrounding and expanding glowing
   gas. The picture combines [13]visible light from the [14]Hubble Space
   Telescope in red and blue with [15]X-ray light from the [16]Chandra
   X-ray Observatory shown in white, and diffuse X-ray emission detected
   by [17]Imaging X-ray Polarimetry Explorer (IXPE) in diffuse purple. The
   central [18]pulsar powers the [19]Crab Nebula's emission and
   [20]expansion by slightly slowing its spin rate, which drives out a
   [21]wind of energetic [22]electrons. The [23]featured image released
   today, the [24]25th Anniversary of the [25]launch of NASA's
   [26]flagship-class X-ray Observatory: [27]Chandra.

          Many Discoveries: [28]Chandra Celebrates 25th Anniversary
                       Tomorrow's picture: spikey moon
     __________________________________________________________________

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    Authors & editors: [40]Robert Nemiroff ([41]MTU) & [42]Jerry Bonnell
                                 ([43]UMCP)
          NASA Official: Amber Straughn [44]Specific rights apply.
            [45]NASA Web Privacy, [46]Accessibility, [47]Notices;
                A service of: [48]ASD at [49]NASA / [50]GSFC,
                         [51]NASA Science Activation
                           & [52]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2407/Crab_MultiChandra_4123.jpg
   3. https://www.nasa.gov/
   4. https://www.esa.int/
   5. https://www.asi.it/
   6. https://science.nasa.gov/mission/hubble/
   7. https://www.nasa.gov/mission/chandra-x-ray-observatory/
   8. https://www.nasa.gov/mission/imaging-x-ray-polarimetry-explorer-ixpe/
   9. https://apod.nasa.gov/apod/ap030201.html
  10. https://en.wikipedia.org/wiki/Crab_Pulsar
  11. https://i.chzbgr.com/full/9047697920/hF7BB9AC7/
  12. https://en.wikipedia.org/wiki/Crab_Nebula
  13. https://science.nasa.gov/ems/09_visiblelight/
  14. https://science.nasa.gov/mission/hubble/overview/about-hubble/
  15. https://science.nasa.gov/ems/11_xrays/
  16. https://chandra.harvard.edu/about/
  17. https://www.nasa.gov/ixpe-overview/
  18. https://apod.nasa.gov/apod/ap210209.html
  19. https://arxiv.org/abs/1704.02968
  20. https://apod.nasa.gov/apod/ap230320.html
  21. https://en.wikipedia.org/wiki/Stellar_wind
  22. https://www.aps.org/archives/publications/apsnews/200010/history.cfm
  23. https://chandra.harvard.edu/photo/2024/25th/more.html
  24. https://chandra.harvard.edu/25th/
  25. https://youtu.be/al0Ol3rGthE
  26. https://en.wikipedia.org/wiki/NASA_large_strategic_science_missions
  27. https://chandra.harvard.edu/
  28. https://chandra.harvard.edu/press/24_releases/press_072224.html
  29. https://apod.nasa.gov/apod/ap240722.html
  30. https://apod.nasa.gov/apod/archivepix.html
  31. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  32. https://apod.nasa.gov/apod/lib/aptree.html
  33. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  34. https://apod.nasa.gov/apod/calendar/allyears.html
  35. https://apod.com/feed.rss
  36. https://apod.nasa.gov/apod/lib/edlinks.html
  37. https://apod.nasa.gov/apod/lib/about_apod.html
  38. https://asterisk.apod.com/discuss_apod.php?date=240723
  39. https://apod.nasa.gov/apod/ap240724.html
  40. http://www.phy.mtu.edu/faculty/Nemiroff.html
  41. http://www.phy.mtu.edu/
  42. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  43. http://www.astro.umd.edu/
  44. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  45. https://www.nasa.gov/about/highlights/HP_Privacy.html
  46. https://www.nasa.gov/general/accessibility/
  47. https://www.nasa.gov/privacy/
  48. https://astrophysics.gsfc.nasa.gov/
  49. https://www.nasa.gov/
  50. https://www.nasa.gov/centers/goddard/
  51. https://science.nasa.gov/learners
  52. http://www.mtu.edu/