Black hole - more articles general

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The curvature of spacetime around the source of the gravitational force (General Relativity)


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• Ergosphere - "The ergosphere is a region located outside a rotating black hole. Its name is derived from the Greek word ergon, which means “work”. It received this name because it is theoretically possible to extract energy and mass from the black hole in this region." - Wikipedia
  
• Event horizon - "In general relativity, an event horizon is a boundary in spacetime beyond which events cannot affect an outside observer. In layman's terms it is defined as "the point of no return" i.e. the point at which the gravitational pull becomes so great as to make escape impossible. The most common case of an event horizon is that surrounding a black hole." - Wikipedia
• Gravitational collapse - "Gravitational collapse in astronomy is the inward fall of a massive body under the influence of gravity. It occurs when all other forces fail to supply a sufficiently high pressure to counterbalance gravity and keep the massive body in hydrostatic equilibrium." - Wikipedia
  
• Gravitational singularity - At the center of a black hole as described by general relativity lies a gravitational singularity, a region where the spacetime curvature becomes infinite. "A gravitational singularity or spacetime singularity is a location where the quantities that are used to measure the gravitational field become infinite in a way that does not depend on the coordinate system." - Wikipedia
  
• Intermediate-mass black hole - "An Intermediate-mass black hole (IMBH) is a black hole whose mass is significantly more than stellar black holes (a few tens of the mass of the Sun) yet far less than supermassive black holes (a few millions of the mass of the Sun)." - Wikipedia
  
• Stellar black hole - "A stellar black hole is a black hole formed by the gravitational collapse of a massive star (more massive than about 20 solar masses at the end of its lifetime. The process is observed as a supernova explosion or as a gamma ray burst" - Wikipedia
  
• Supermassive black hole - "A supermassive black hole is the largest type of black hole in a galaxy, on the order of hundreds of thousands to billions of solar masses. Most, and possibly all galaxies, including the Milky Way, are believed to contain supermassive black holes at their centers." - Wikipedia