SOLAR SYSTEM

Detailed explanation-1: -This effect is called granulation. Each granule is about 1000km across and is caused by the convection of gas. Hot gas rises in the middle of a granule, and this area appears brighter, then the gas cools and sinks on the edges of the granule and these areas are darker.

Detailed explanation-2: -In a closeup view, the photosphere has a mottled appearance called granulation. The granulation provides evidence of convection on the Sun.

Detailed explanation-3: -Granulation is a property some paints have in which pigments pool together in small groups once applied. This produces a so-called flocculated or curdled effect. The granulated pigments will show up as small, unevenly dispersed dots and/or spots in the paint layer.

Detailed explanation-4: -Granulation is caused by the convection operating below the photosphere. This convection produces columns of rising gas just below the photosphere that are about 700 to 1000 km in diameter. In these columns hot gas rises with a velocity of several kilometers per second, as confirmed by Doppler shift measurements.