To choose and maintain a direction of movement you need a compass. But what’s the point of a compass if I don’t know my position with respect to the destination I want to reach?When a racing pigeon intends to embark on its flight home, it must first understand where home […]
Polar Star
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The Polar Star between Ursa Major and Cassiopeia The Polar Star is the most famous star because it is almost perfectly on the extension of the Earth’s axis in the sky, the celestial North Pole (less than 1 °), around which everything seems to rotate (from east to west) in […]