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.

                                2023 April 3
   [2]A false-color yellow-on red radio image of our Galactic Center shows
      yellow radio-emitting arcs above streaks and a bright cocoon that
    contains our Galaxy's central black hole. Please see the explanation
                       for more detailed information.

                        The Galactic Center Radio Arc
           Image Credit: [3]Ian Heywood ([4]Oxford U.), [5]SARAO;

   Explanation: What causes this unusual curving structure near the center
   of our Galaxy? The long parallel rays slanting across the top of the
   [6]featured radio image are known collectively as the [7]Galactic
   Center Radio Arc and point out from the [8]Galactic plane. The [9]Radio
   Arc is connected to the [10]Galactic Center by strange curving
   filaments known as the [11]Arches. The bright radio structure at the
   bottom right surrounds a [12]black hole at the [13]Galactic Center and
   is known as [14]Sagittarius A*. One [15]origin hypothesis holds that
   the Radio Arc and the Arches have their geometry because they contain
   hot [16]plasma flowing along lines of a constant [17]magnetic field.
   [18]Images from NASA's [19]Chandra X-ray Observatory appear to show
   this [20]plasma colliding with a nearby cloud of cold gas.

                     Tomorrow's picture: from inner mars
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    Authors & editors: [32]Robert Nemiroff ([33]MTU) & [34]Jerry Bonnell
                                 ([35]UMCP)
          NASA Official: Phillip Newman [36]Specific rights apply.
              [37]NASA Web Privacy Policy and Important Notices
                A service of: [38]ASD at [39]NASA / [40]GSFC,
                         [41]NASA Science Activation
                           & [42]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2304/GalCenRadioArc_MeerKat_1080.jpg
   3. https://www.physics.ox.ac.uk/our-people/Heywood
   4. https://www.physics.ox.ac.uk/
   5. https://www.sarao.ac.za/
   6. https://www.sarao.ac.za/media-releases/new-meerkat-radio-image-reveals-complex-heart-of-the-milky-way/
   7. https://adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1989ApJ...343..177L
   8. https://apod.nasa.gov/apod/ap011020.html
   9. https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/nature-and-origin-of-the-galactic-center-radio-arc-a-vla-faraday-study/E2AE6A7AFF74FAC6DE0ACA782C2238AD
  10. https://apod.nasa.gov/apod/ap220202.html
  11. https://apod.nasa.gov/apod/ap010614.html
  12. https://apod.nasa.gov/apod/ap220513.html
  13. https://apod.nasa.gov/apod/ap180729.html
  14. https://en.wikipedia.org/wiki/Sagittarius_A*
  15. https://ui.adsabs.harvard.edu/abs/1994ApJ...424L..91S/abstract
  16. http://www.plasmas.org/what-are-plasmas.htm
  17. https://en.wikipedia.org/wiki/Magnetic_field
  18. http://chandra.harvard.edu/photo/2002/gradioarc/index.html
  19. https://www.nasa.gov/mission_pages/chandra/main/index.html
  20. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2001AAS...19910902Y
  21. https://apod.nasa.gov/apod/ap230402.html
  22. https://apod.nasa.gov/apod/archivepix.html
  23. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  24. https://apod.nasa.gov/apod/lib/aptree.html
  25. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  26. https://apod.nasa.gov/apod/calendar/allyears.html
  27. https://apod.nasa.gov/apod.rss
  28. https://apod.nasa.gov/apod/lib/edlinks.html
  29. https://apod.nasa.gov/apod/lib/about_apod.html
  30. https://asterisk.apod.com/discuss_apod.php?date=230403
  31. https://apod.nasa.gov/apod/ap230404.html
  32. http://www.phy.mtu.edu/faculty/Nemiroff.html
  33. http://www.phy.mtu.edu/
  34. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  35. http://www.astro.umd.edu/
  36. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  37. https://www.nasa.gov/about/highlights/HP_Privacy.html
  38. https://astrophysics.gsfc.nasa.gov/
  39. https://www.nasa.gov/
  40. https://www.nasa.gov/centers/goddard/
  41. https://science.nasa.gov/learners
  42. http://www.mtu.edu/