History
Around the year 1610, Galileo Galilei observed sunspots and calculated the rotation of the Sun. In 1630, Christoph Scheiner reported that the Sun had different rotational periods at the poles and at the equator, in good agreement with modern values.
Read more about this topic: Differential Rotation
Famous quotes containing the word history:
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—Henry David Thoreau (1817–1862)
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—Henry David Thoreau (1817–1862)
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—Derek Wall (b. 1965)