"In theoretical general relativity, a geon is an electromagnetic or gravitational wave which is held together in a confined region by the gravitational attraction of its own field energy. They were first investigated theoretically in 1955 by J. A. Wheeler, who coined the term as a contraction of """"gravitational electromagnetic entity.""""   GenOn Energy, Inc., together with its subsidiaries, provides energy, capacity, ancillary, and other energy services to wholesale customers in the energy market in the United States. It also operates as a wholesale generator of electricity, and involves in asset management and proprietary trading, fuel oil management, and natural gas transportation and storage activities. The company generates electricity using coal, natural gas, and oil resources. It operates 8 generating facilities with a total net generating capacity of 6,341 megawatt in Maryland, New Jersey, and Virginia, 23 generating facilities with a total net generating capacity of 7,483 megawatt in Illinois, Ohio, and Pennsylvania, 7 generating facilities with a total net generating capacity of 5,391 megawatt in California, and 8 generating facilities with a total net generating capacity of 4,482 megawatt in Florida, Massachusetts, Mississippi, New York, and Texas. The company serves independent system operators, regional transmission organizations, power aggregators, retail providers, electric-cooperative utilities, other power generating companies, and load serving entities. GenOn Energy, Inc. was founded in 1982 and is headquartered in Houston, Texas. As of December 14, 2012, GenOn Energy, Inc. operates as a subsidiary of NRG Energy, Inc."