A corona is caused by light being diffracted by water droplets in clouds or mist.
Corona around the full moon. (2010-09-19)
Corona around the full moon. (2011-04-16)
Corona around the sun. (2013-02-23)
Corona around the partially eclipsed sun. (2015-03-20)
Corona around the sun. (2016-03-12)
A corona around the full moon. (2016-05-21)
Intense corona around the sun. (2016-11-12)
Intense corona around the sun. (2016-11-12)
Intense corona around the sun. (2016-11-12)
Corona around the sun. (2017-03-11)
Corona around the sun. (2017-07-08)
Corona around the sun. In this case the sun is blocked by the clouds, and the blue inner part of a corona can clearly be seen. (2019-03-02)