Information AboutPhotosphere |
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The Sun's photosphere has a Temperature of about 5800 Kelvin s; other stars may have hotter or cooler photospheres. The Sun's photosphere is composed of Convection Cell s called Granules —firestorms each approximately 1000 kilometers in diameter with hot rising gas in the center and cooler gases falling in the narrow spaces between them. Each granule has a lifespan of only about eight minutes, resulting in a continually shifting "boiling" pattern. Amid the typical granules are supergranules up to 30,000 kilometers in diameter with lifespans of up to 24 hours. It is unknown whether these features are typical of other stars. The Sun's visible atmosphere has other layers above the photosphere: the 10,000 Kilometer -deep Chromosphere (typically observed by filtered light, for example H-alpha ) lies just between the photosphere and the much hotter but more tenuous Corona . Other "surface features" on the photosphere are Solar Flare s and Sunspot s. |