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 constellation is located in the northern hemisphere of the sky. Its name means âthe twinsâ in Latin. Gemini is one of the zodiac constellations, first catalogued by the Greek astronomer Ptolemy in the 2nd century. The constellation represents the twins Castor and Pollux (Polydeuces), also known as the Dioscuri in ancient times, in Greek mythology. The constellationâs symbol is â.