Mongolian constellations and cosmogony were inherited from the occidental civilisation notably by the contact with Alexander the Great
SunMongolian cosmogony - Wikipedia
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At the origin of the world, there was only one man and vast particularly dry meadows, burned by the seven suns which lit the world. This man, a very good archer, made the promise to the gods that he pierced all these suns without missing a target even once. If he should fail, he would cut himself all the fingers one by one and leave to live in a hole like a marmot (ground-hog) to ward off the curse that would weigh on him. He took his bow, pulled a first arrow and hit his target. A second, a third until the sixth which destroyed the suns. He finished by pulling his seventh arrow towards the last sun, when a swallow flew off and passed through its direction. The bird was hit. The man had not reach his goal, so he left towards exile in a hole, cut his fingers and turned into a marmot. The swallow had just saved our Sun, otherwise all life would have disappeared from the world's surface.