Photosphere

A photosphere is the region of a luminous object, usually a star, that is transparent to photons of certain wavelengths.

The Sun's photosphere has a temperature between 4,400 and 6,600 K (4,130 and 6,330 °C) (with an effective temperature of 5,772 K (5,499 °C))[6][7] meaning human eyes perceive it as an overwhelmingly bright surface, and with sufficiently strong neutral density filter, as a hueless, gray surface.

Each granule has a lifespan of only about twenty minutes, resulting in a continually shifting "boiling" pattern.

Grouping the typical granules are supergranules up to 30,000 km (19,000 mi) in diameter with lifespans of up to 24 hours and flow speeds of about 500 m/s (1,600 ft/s), carrying magnetic field bundles to the edges of the cells.

Other magnetically related phenomena in the Sun's photosphere include sunspots and solar faculae dispersed between granules.