How tracking the Moon helped astronomers unlock our understanding of celestial motion

Humanity’s need to track the Moon’s changing phases and motions is ancient. Mammoth hunters used the Moon as a timekeeper, carving crescent-shaped notches into bone and tusk. Sumerian astronomers recorded the Moon’s motion on clay tablets more than 3,000 years ago.  But as reliable and trustworthy as the Moon may seem, its dance around EarthContinue reading “How tracking the Moon helped astronomers unlock our understanding of celestial motion”
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