They say, it was like this. Once upon a time there lived granny and granddaughter. In those times the sky was firm and transparent, like clean ice forming on the stream. People used to walk up to the sky, they had bone knives and chipped the stars off from there, then they fastened the stars around the upper openings of their yarangas. So, they had plenty of good light, like during daytime. Once granny and granddaughter went to pick the stars. They collected a full seal-skin sack. It was time to return to the earth. They heard at that point: a white bear chased them, he wanted to eat them and was getting nearer and nearer. They threw the seal-skin sack, - the stars scattered along the road. Thus, the Milky Way appeared. The bear couldn't cross the Milky Way, but he found the narrow strip, jumped over it and resumed chasing. The granny stroke the sky with her knife and split it. The sky fragments started to shine like flames. So the Northern Lights appeared. It took some time for the bear to run around the flashing place, and he saw, that they had gone far, and he speeded up. But granny and granddaughter descended to the earth, ignited bonfire, and the sky melted. The bear couldn't swim off from it and remained there as the Great Bear. Thereafter the people have been unable to illuminate their yarangas by stars and they have made electricity. And the sky has been liquid since then, so the astronauts are navigating there trying to warm it up. That is about all.