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 August 21
    [2]A blue oval is shown with a red and yellow horizontal band running
   across the middle. Red and yellow spots also appear distributed inside
     the oval. Please see the explanation for more detailed information.

                    Fermi's 12-year All-Sky Gamma-ray Map
   Image Credit: NASA, DOE, Fermi LAT Collaboration; Text: [3]Barb Mattson
                     ([4]U. Maryland, [5]NASA's [6]GSFC)

   Explanation: Forget [7]X-ray vision — imagine what you could see with
   [8]gamma-ray vision! The [9]featured all-sky map shows what the
   universe looks like to NASA's [10]Fermi Gamma-ray Space Telescope.
   Fermi sees light with energies about a billion times what the [11]human
   eye can see, and [12]the map combines 12 years of Fermi observations.
   The colors represent the brightness of the [13]gamma-ray sources, with
   brighter sources appearing lighter in color. The prominent stripe
   across the middle is the central plane of our [14]Milky Way galaxy.
   Most of the red and yellow dots scattered above and below the Milky
   Way’s plane are very [15]distant galaxies, while most of those within
   [16]the plane are nearby [17]pulsars. The [18]blue background that
   fills the image is the [19]diffuse glow of gamma-rays from distant
   sources that are too dim to be detected individually. Some gamma-ray
   sources [20]remain unidentified and topics of research — currently
   [21]no one knows what they are.

                       Tomorrow's picture: open space
     __________________________________________________________________

      [22]< | [23]Archive | [24]Submissions | [25]Index | [26]Search |
   [27]Calendar | [28]RSS | [29]Education | [30]About APOD | [31]Discuss |
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     __________________________________________________________________

    Authors & editors: [33]Robert Nemiroff ([34]MTU) & [35]Jerry Bonnell
                                 ([36]UMCP)
          NASA Official: Amber Straughn [37]Specific rights apply.
            [38]NASA Web Privacy, [39]Accessibility, [40]Notices;
                A service of: [41]ASD at [42]NASA / [43]GSFC,
                         [44]NASA Science Activation
                           & [45]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2408/12YearMap_Fermi_2160.jpg
   3. https://science.gsfc.nasa.gov/astrophysics/bio/barbara.j.mattson
   4. https://www.astro.umd.edu/
   5. https://science.gsfc.nasa.gov/astrophysics/
   6. https://www.nasa.gov/goddard/
   7. https://science.nasa.gov/ems/11_xrays/
   8. https://science.nasa.gov/ems/12_gammarays/
   9. https://svs.gsfc.nasa.gov/14090/
  10. https://science.nasa.gov/mission/fermi
  11. https://en.wikipedia.org/wiki/Human_eye#/media/File:3D_Medical_Animation_Eye_Structure.jpg
  12. https://www.instagram.com/reel/C-dXEVkyGCj/
  13. https://apod.nasa.gov/apod/ap230906.html
  14. https://imagine.gsfc.nasa.gov/science/objects/milkyway1.html
  15. https://nasa.tumblr.com/post/171449548004/the-universes-brightest-lights-have-some-dark
  16. https://apod.nasa.gov/apod/ap180313.html
  17. https://science.nasa.gov/universe/neutron-stars-are-weird/
  18. https://apod.nasa.gov/apod/ap210826.html
  19. https://imagine.gsfc.nasa.gov/science/objects/diffuse_background1.html
  20. https://imagine.gsfc.nasa.gov/observatories/satellite/compton/unidentified.html
  21. https://t3.ftcdn.net/jpg/03/88/96/18/360_F_388961826_N9HqeJkq9qagMtXaFPMfdK9qawWj4T2H.jpg
  22. https://apod.nasa.gov/apod/ap240820.html
  23. https://apod.nasa.gov/apod/archivepix.html
  24. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  25. https://apod.nasa.gov/apod/lib/aptree.html
  26. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  27. https://apod.nasa.gov/apod/calendar/allyears.html
  28. https://apod.com/feed.rss
  29. https://apod.nasa.gov/apod/lib/edlinks.html
  30. https://apod.nasa.gov/apod/lib/about_apod.html
  31. https://asterisk.apod.com/discuss_apod.php?date=240821
  32. https://apod.nasa.gov/apod/ap240822.html
  33. http://www.phy.mtu.edu/faculty/Nemiroff.html
  34. http://www.phy.mtu.edu/
  35. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  36. http://www.astro.umd.edu/
  37. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  38. https://www.nasa.gov/about/highlights/HP_Privacy.html
  39. https://www.nasa.gov/general/accessibility/
  40. https://www.nasa.gov/privacy/
  41. https://astrophysics.gsfc.nasa.gov/
  42. https://www.nasa.gov/
  43. https://www.nasa.gov/centers/goddard/
  44. https://science.nasa.gov/learners
  45. http://www.mtu.edu/