http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA16881
Interpreting the “song” of a distant black hole, sung in b-flat:
http://www.nasa.gov/centers/goddard/universe/black_hole_sound.html
http://science.nasa.gov/science-news/science-at-nasa/2003/09sep_blackholesounds/
"Chorus" radio waves within Earth’s magnetosphere:
http://www.nasa.gov/mission_pages/rbsp/news/emfisis-chorus.html