Umbrella

.                                         A black hole is a region of spacetimeexhibiting gravitational acceleration so strong that nothing—no particles or evenelectromagnetic radiation such as light—can escape from it.[6] The theory of general relativity predicts that a sufficiently compactmass can deform spacetime to form a black hole.[7][8] The boundary of the region from which no escape is possible is called theevent horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed.[9] In many ways, a black hole acts like an ideal black body, as it reflects no light.[10][11] Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of akelvin for black holes of stellar mass, making it essentiall