Once per sidereal day, the stars are arranged above the Earth as shown in this map. At that instant, Auriga is directly above the eastern seaboard of North America, with its brightest star more or less over Toronto. At the same instant, the Space Needle points out the Andromeda Galaxy; whilst Europeans labour under the Plough.

Astronomers have divided up the celestial sphere into constellations for centuries. But as science progressed, it became important that everywhere on the sphere should be in a single constellation, which everyone agreed on, so spaces were marked out and the ancient mythical figures were penned into enclosures bounded by laser straight edges.

Around the same time, it became important to governments that everywhere in the world should be in a single country. They’re still working on agreeing on that.

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