Day 141: Solar Diameter

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After the astronomy students looked at the sun with their eclipse glasses they set about gathering some data to calculate the diameter of the sun. They projected the image of the sun on to millimeter ruled graph paper. Knowing the distance between the pinhole and the image, the distance to the sun, and the relationship between similar triangles, they came up with 1,500,000 km as a diameter (error of less than 8%).

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Screen shot 2014-04-10 at 1.42.19 PM

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