Beers, D. G, et al. Map of Cambria Co., Pennsylvania: from actual surveys & official records. Philadelphia: Published by A. Pomeroy, . Phila.: Printed by Fred. Bourquin, 1867. Map. Retrieved from the Library of Congress, <https://www.loc.gov/item/2012592157/>.
A typical heating element is usually a coil, ribbon (straight or corrugated), of strip of wire that gives off heat much like a lamp filament. When an electric current flows through it, it glows red hot and converts the electrical energy passing through it into heat, which it radiates out in all directions.
Inside supernovae and black holes it is hot enough to fuse atoms together to create the heavier elements - astronomical temperatures. Our sun, even at its hottest, would not ever be near supernova temperatures. Though we have no way of knowing really how hot existence was at the point of the Big Bang... (for further information, I recommend reading Bill Bryson's Short History of Nearly Everything).