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 August 2

     IFRAME: [2]https://apod.nasa.gov/apod/image/1803/AstroSoM/hudf.html

               The Hubble Ultra Deep Field in Light and Sound
   Image Credit: [3]NASA, [4]ESA, [5]Hubble; Sonification: [6]G. Salvesen
                   ([7]UCSB); Data: [8]M. Rafelski et al.

   Explanation: Have you heard about the Hubble Ultra-Deep Field? Either
   way, you've likely not [9]heard about it like this -- please run your
   cursor over the featured image and listen! The [10]Hubble Ultra-Deep
   Field (HUDF) was created in 2003-2004 with the [11]Hubble Space
   Telescope staring for a long time toward near-empty space so that
   distant, [12]faint galaxies would become visible. One of the most
   famous images in astronomy, the [13]HUDF is featured here in a vibrant
   way -- with sonified distances. Pointing to a galaxy will play a
   [14]note that indicates its approximate redshift. Because [15]redshifts
   shift light toward the red end of the [16]spectrum of light, they are
   depicted here by a shift of tone toward the low end of the [17]spectrum
   of sound. The further the galaxy, the greater its [18]cosmological
   redshift (even if it appears blue), and the lower the tone that will be
   played. The average galaxy in the [19]HUDF is about 10.6 billion
   [20]light years away and sounds like an [21]F#. What's the [22]most
   distant galaxy you can find?

                Note: Sounds will only play on some browsers.
                This week at NASA: Hubble [23]#DeepFieldWeek
                  Tomorrow's picture: meteor the milky way
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [35]Robert Nemiroff ([36]MTU) & [37]Jerry Bonnell
                                 ([38]UMCP)
          NASA Official: Phillip Newman [39]Specific rights apply.
              [40]NASA Web Privacy Policy and Important Notices
                A service of: [41]ASD at [42]NASA / [43]GSFC
                           & [44]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/1803/AstroSoM/hudf.html
   3. https://www.nasa.gov/
   4. https://www.esa.int/
   5. https://www.nasa.gov/mission_pages/hubble/main/index.html
   6. https://www.colorado.edu/aps/greg-salvesen
   7. http://www.physics.ucsb.edu/
   8. https://ui.adsabs.harvard.edu/abs/2015AJ....150...31R/abstract
   9. https://i.pinimg.com/564x/33/63/f6/3363f6be8a0b534cd852395723dd6700.jpg
  10. https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field
  11. https://www.nasa.gov/mission_pages/hubble/story/index.html
  12. https://esahubble.org/science/deep_fields/
  13. https://apod.nasa.gov/apod/ap040309.html
  14. https://en.wikipedia.org/wiki/Musical_note
  15. https://www.youtube.com/watch?v=8U4O8XB14tg
  16. https://science.nasa.gov/ems/01_intro
  17. http://newt.phys.unsw.edu.au/jw/sound.spectrum.html
  18. https://apod.nasa.gov/apod/ap130408.html
  19. https://apod.nasa.gov/apod/ap200726.html
  20. https://chandra.harvard.edu/photo/cosmic_distance.html
  21. https://en.wikipedia.org/wiki/Piano_key_frequencies
  22. http://asterisk.apod.com/discuss_apod.php?date=210802
  23. https://www.nasa.gov/sites/default/files/atoms/files/hubble-deep-field-week-social-media-toolkit-2021.pdf
  24. https://apod.nasa.gov/apod/ap210801.html
  25. https://apod.nasa.gov/apod/archivepix.html
  26. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  27. https://apod.nasa.gov/apod/lib/aptree.html
  28. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  29. https://apod.nasa.gov/apod/calendar/allyears.html
  30. https://apod.nasa.gov/apod.rss
  31. https://apod.nasa.gov/apod/lib/edlinks.html
  32. https://apod.nasa.gov/apod/lib/about_apod.html
  33. http://asterisk.apod.com/discuss_apod.php?date=210802
  34. https://apod.nasa.gov/apod/ap210803.html
  35. http://www.phy.mtu.edu/faculty/Nemiroff.html
  36. http://www.phy.mtu.edu/
  37. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  38. http://www.astro.umd.edu/
  39. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  40. https://www.nasa.gov/about/highlights/HP_Privacy.html
  41. https://astrophysics.gsfc.nasa.gov/
  42. https://www.nasa.gov/
  43. https://www.nasa.gov/centers/goddard/
  44. http://www.mtu.edu/