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ABC News
ABC News
National

Astrophysicists use Exmouth solar eclipse to help solve mystery of why Sun's corona is so hot

Exmouth Eclipse Sun Robin Cook Colorado Earth NASA University of Colorado
Scientist Kevin Reardon and doctoral student Sarah Bruce are heading to Exmouth for the solar eclipse. (Supplied: John Williams)

The sun is a hot place in our solar system with a core temperature of 15 million degrees Celsius.

Its surface is relatively cool at about 6,000 degrees, but then things get interesting again with its corona, the outer atmosphere, rising again to more than 1 million degrees.

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