The Sun’s photosphere has a temperature between 4,500 and 6,000 K (4,230 and 5,730 °C) (with an effective temperature of 5,777 K (5,504 °C)) and a density of about 3 × 10 − 4 kg/m 3; increasing with depth into the sun. Other stars may have hotter or cooler photospheres. The Sun’s photosphere is around 100 kilometers thick, and is composed of convection cells called granules—cells of …
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