^ ab“"Beyond the Blue Horizon" – A Total Solar Eclipse Chase” (1999年8月5日). 2010年5月21日閲覧。 “On ordinary days, the corona is hidden by the blue sky, since it is about a million times fainter than the layer of the sun we see shining every day, the photosphere.”
^ abLang, K.R. (September 2006). “5.1 MAGNETIC FIELDS IN THE VISIBLE PHOTOSPHERE”. Sun, earth, and sky (2nd ed.). Springer. p. 81. ISBN978-0-387-30456-4. "this opaque layer is the photosphere, the level of the Sun from which we get our light and heat"
^Mariska, J.T.. The solar transition region. p. 60. ISBN978-0-521-38261-8. "100 km suggested by average models"
^“The Sun's Corona – Introduction”. NASA. 2010年5月21日閲覧。 “Now most scientists believe that the heating of the corona is linked to the interaction of the magnetic field lines.”
^Lewis, J.S. (2004-02-23). Physics and chemistry of the solar system (second ed.). Elsevier Academic Press. p. 87. ISBN978-0-12-446744-6. "The dominant color is influenced by the Balmer radiation of atomic hydrogen"