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Sun Facts
About 4.5 billion years ago, the sun began to take shape from a molecular cloud that was mainly composed of hydrogen and helium.
The sun is about 150 million kilometers (93 million miles) from Earth. This distance, called an astronomical unit (AU), is a standard measure of distance for astronomers and astrophysicists.
Sun’s core temperature can exceed 15.7 million kelvin (also 15.7 million degrees Celsius, or 28 million degrees Fahrenheit).
Sun’s photosphere that is the outer, yellow surface is about 6,000K (5,700°C, 10,300°F).