The pattern of rising hot gas cells all over the photosphere is called:

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The pattern of rising hot gas cells all over the photosphere is called granulation. Granulation is the pattern of rising hot gas cells all over the photosphere. Filaments are large, dark, snake-like structures that extend outward from the Sun's surface. Sunspots are dark, cooler regions on the photosphere. Convective projections are not a known term in solar science. Prominences are large, bright, loop-like structures that extend outward from the Sun's surface.

The Pattern of Rising Hot Gas Cells All Over the Photosphere