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A 2,700-year-old eclipse reveals new clues about Earth

So: researchers have taken another look at a total solar eclipse recorded in China in 709 BCE and uncovered fresh clues about Earth's ancient rotation. By correcting the location of the ancient city of Qufu, they could reconstruct where the eclipse appeared and refine estimates of how quickly Earth was spinning. A later historical account may also describe the Sun's corona, whose shape hints that solar activity was picking up again after a quiet stretch. The findings offer a fascinating new way to connect ancient observations with modern astronomy.
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