Rivers were used to turn watermills and the Romans even used geothermal water for heating. Until the middle of the 18th century renewable sources of energy were the only forms of energy available, but then, with the advent of the Industrial Revolution, fossil fuels began to be exploited.
The Sidereal Zodiac is the position of the sun referenced against the star background, as a measure of the flow of time. The framework for the star background is the constellations the sun passes in front of. This is the one astronomers use.
Sagittarius Horoscope. Sagittarius (November 23 - December 22) is the ninth sign of the zodiac. They are symbolically represented by an archer who is half horse and half man. This signifies the dual personality that they have.