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.
This article is about Astrology. For additional information, see Taurus (constellation). Taurus (Latin for the Bull; symbol: , Unicode: â) is the second astrological sign in the present zodiac. It spans the 30â60th degree of the zodiac. The Sun is in the sign of Taurus from about April 21 until about May 21 (Western astrology) or from about May 16 to June 16 (Sidereal astrology).