Constellations

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realise, "Oh! That's part of Orion!" Suddenly, the rest of the constellation falls into place and you can declare: "There's Betelgeuse in Orion's left shoulder and Rigel is his foot." And once you recognise Orion, you can remember that Orion's Hunting Dogs are always nearby.
Where did the come from?
OK, so we know the are helpful for remembering the stars, but why would people want to do that (besides an astronomer)? After all, I said at the beginning that farmers invented the . Why did they do that? Was it for some religious purpose?
Yes and no. Around the world, farmers know that for most crops, you plant in the spring and harvest in autumn. But in some regions, there is not much differentiation between the seasons. Since different are visible at different times of the year, you can use them to tell what month it is. For example, Scorpius is only visible in the Northern Hemisphere's evening sky in the summer. When they saw certain , they would know it was time to begin the ...

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