A granule is a convective cell, about 1,000 km in diameter, in the solar photosphere. Each granule lasts on average about five minutes and represents a temperature roughly 300° higher than the surrounding dark areas. At any one time, granules cover about one-third of the solar photosphere and are collectively referred to as granulation.
Related category SOLAR TOPICS
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact