By Richard Bloch:Let's say I'm a farmer in ancient Greece nearly 2000 years ago. Will I know when it's time to plant my crops and when to harvest them?
Probably. The ancient Greeks were pretty smart. They kept track of the Sun and Moon. They knew when the sun would reach both its highest mid-day point of the year (summer) and its lowest (winter).
But in many ways, the ancient Greeks weren't so smart. Their astronomers were, well, let's say a bit confused. That pesky Ptolemaic Model assumed that the Earth was at the center of everything, and that everything else moved in perfect circles around it. When those circles weren't perfect, they contrived circles within circles (epicycles) to explain the discrepancies.
Someone named Copernicus and a bunch of others nixed the idea of perfect circles and put Earth back where it belonged, third rock from the Sun.
But did that matter
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