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Definition
| the disk of gas and dust found orbiting newborn stars, as well as compact stellar remnants such as white dwarfs, neutron stars, and black holes when they are in binary systems and are sufficiently close to their binary companions to draw off material |
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Term
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Definition
| a region in spacetime where gravity is so strong that nothing—not even light—can escape |
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Term
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Definition
| a boundary in spacetime such that events inside the boundary can have no effect on the world outside it—that is, the boundary of the region around a black hole where the curvature of spacetime no longer provides any way out |
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Term
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Definition
| the point of zero volume and infinite density to which any object that becomes a black hole must collapse, according to the theory of general relativity |
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