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facula

(bright spot on a planet or the Sun)

Facula (plural faculae) is a general term for a bright spot, used for a common specific type of feature on the Sun, and used more generally in descriptions of planets and moons.

A solar facula is a bright spot in the region between granules.

The dwarf planet, Ceres has pronounced bright spots for which the term has been used, and which are of interest.


(planets,Sun)
http://en.wikipedia.org/wiki/Facula

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