Astronomical factors of origin and evolution of intelligent life from the perspective of energy matters

On the basis of the well-known definitions of a human being, the article notes human proneness to discover the laws of the universe in correspondence with the changes in the sky of stars, in particular, the precession and appearance of the polar stars. It is shown, how the astronomical knowledge can help philosophers to see the structure of the evolution of living organisms in the biosphere and noosphere phases, to understand the nature of the transition from the rational form of activity to the intelligent one. The author considers the value of human awareness of the changes of the sky of stars at different levels of knowledge: materialistic, imaginative-practical; imaginative-symbolic; imaginative-sign; scientific.