Friday 9 December 2011

THE SOLAR SYSTEM

19.1 The Constituents Of The Solar System

THE SUN


1.The Sun is a small star.The Sun is located at the centre of the Solar System

THE TEMPERATURE OF THE SUN
The Sun's core can reach 10 to 22.5 million°F. The surface temperature is approximately 9,900°F (5,500°C). The outer atmosphere of the Sun (which we can see during a solar eclipse) gets extremely hot again, up to 1.5 to 2 million degrees. At the center of big sunspots the temperature can be as low as 7300 °F (4300 K, 4000 °C). The temperature of the Sun is determined by measuring how much energy (both heat and light) it emits.

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