The Boomerang Nebula located 5,000 light years away from our home planet is measured -457.87*F or -272.15*C in temperature. It is believed to be a star system in the constellation Centaurus.
Hydropower! Geothermal is heat coming from the earths core so obvi no, hydro kinetic, is not it but im not sure how to explain sorry, and solar thermal is from the heat of the sun.
Rome was located<span> 15 miles up the Tiber River in order to protect the city from being raided by pirates. This also provided a source of water and a waterway to the Mediterranean Sea. The city was built on seven steep hills that allowed Romans to defend the city against enemies.</span>