FACULA (diminutive of fax, Lat. for “torch”), in astronomy, a minute shining spot on the sun’s disk, markedly brighter than the photosphere in general, usually appearing in groups. Faculae are most frequent in the neighbourhood of spots. (See Sun.)
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FACULA (diminutive of fax, Lat. for “torch”), in astronomy, a minute shining spot on the sun’s disk, markedly brighter than the photosphere in general, usually appearing in groups. Faculae are most frequent in the neighbourhood of spots. (See Sun.)