Red giant million kelvin) and establishes hydrostatic equilibrium. Over its main sequence life, the star slowly converts the hydrogen in the core into helium; its main-sequence life ends when nearly all the hydrogen in the core has been fused. For the Sun, the main-sequence lifetime is approximately 10 billion years. More-massive stars burn disproportionately faster and so have a shorter lifetime than less massive stars. When the star exhausts the hydrogen fuel in its core, nuclear reactions can no longer continue and so the core begins to contract due to its own gravity. This brings additional hydrogen into a zone where the
Southern Star Central Gas Pipeline Southern Star Central Gas Pipeline Southern Star Central Gas Pipeline, Inc, headquartered in Owensboro, Kentucky, is a natural gas transmission system spanning over in the Midwest and Mid-continent regions of the United States. Southern Star's employees and its pipeline system and facilities are located throughout Kansas, Oklahoma, Missouri, Wyoming, Colorado, Texas, Nebraska, and Kentucky. It serves major markets such as St. Louis, Wichita, and Kansas City. Southern Star is a locally managed, private company owned by GE Energy Financial Services and Caisse de dépôt et placement du Québec. The company is more commonly referred to as Southern Star. The company's