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.
Libra is the only inanimate sign of the zodiac, all the others representing either humans or animals.any modern astrologers regard it as the most desirable of zodiacal types because it represents the zenith of the year, the high point of the seasons, when the harvest of all the hard work of the spring is reaped.