> Our ancient ancestors got it for free, and I wonder if they thought anything of it. Not sure what they thought of it, but I think it's telling how aware they

> Our ancient ancestors got it for free, and I wonder if they thought anything of it. Not sure what they thought of it, but I think it's telling how aware they were of the night sky as an active environment, e.g. the movements of the planets, and the relationships between events in the sky and our seasons (even though the their explanatory models were wrong). On a clear night - especially in winter - before the invention of fire, it's all you'd be aware of. No wonder that they made patterns (constellations) of the brighter stars.