Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
A photograph of the sun made by monochromatic light, usually ofthe calcium line (k), and showing the sun's faculæ and prominences.
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
