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What Makes the Sun Yellow?

Green Flash Over Setting Sun
Skywatcher Amir H. Abolfath captured this photo of the setting sun over the Zagros Mountains of Iran. The green flash above the sun lasts for mere seconds making it often difficult to observe. (Image credit: Amir H. Abolfath, The World At Night (TWAN))

Our sun is a star and all stars produce light.

Stars make light of different colors because of their different temperatures. Cool stars are red or orange. Medium hot stars like the sun are yellow, and blue stars are the hottest of all.

Our sun is 93 million miles (about 150 million kilometers) away from the Earth. Its light takes about eight minutes to reach Earth.

The sun burns using a nuclear fusion process, combining hydrogen into helium. The sun’s surface is about 6,000 Kelvin, which is 10,340 degrees Fahrenheit (5,726 degrees Celsius).

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