• Question: How did people find the radius, diameter and the circumference of the sun because its so hot it must be hard

    Asked by 573spdm38 to Stephen on 7 Mar 2018.
    • Photo: Stephen Wilkins

      Stephen Wilkins answered on 7 Mar 2018:


      Using the measured size of the Sun on the sky and the distance to the Sun combined with trigonometry you can easily measure the diameter. From there getting the radius and circumference is easy.

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