It is the gravity center of our solar system and its planets. It drives the life processes in mother nature, e.g. starting the nourishment-chains via photosynthesis in plants. It drives the wind and weather. Hereby water has a vital role, with its unique molecule characteristics and the temperature ranges related to the state of matter as ice, fluid or steam, and the respective energy content. It has the second highest heat-capacity (around 4,19 J/kg*K at 20°C) after ammonia. It is used as energy carrier in conventional power plants - mainly based on fossil fuels - since the invention of the steam machine. Ancient tribes, old and indigenous civilizations had honored the sun as a god or goddess. The existence of the world in space is a miracle.