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.
Ophiuchus is a sign in the Sidereal Zodiac or 13-sign Zodiac, which is a moving Zodiac, as opposed to the Western fixed Zodiac. This moving Zodiac that acknowledges Ophiuchus has shifted almost one full sign from the fixed Zodiac, hence the ânewâ astrological sign dates: Capricorn: Jan. 20 â Feb. 16.