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.
The growing core burns the Sun's hydrogen yet more rapidly, which in turn only enlarges the core more rapidly. . . . In short, in the end, the nuclear furnace at the center of every star begins to overheat. To put numbers on this, when the Sun was formed 4.5 billion years ago it was about 30% dimmer than at present.