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.
Gemini (pronunciation: /ËdÊÉmÉªnaÉª/ or /ËdÊÉmÉªniË/ JEM-in-eye or JEM-in-ee) (â) is the third astrological sign in the zodiac, originating from the constellation of Gemini. Under the tropical zodiac, the sun transits this sign between May 21 and June 21. Gemini is represented by The Twins Castor and Pollux. The symbol of the twins is based on the Dioscuri, two mortals that were granted shared godhood after death.