Interesting Facts About Black Holes
Author : facts ride | Published On : 14 May 2022
A black hole is a region of spacetime where gravity is so strong that nothing can escape – not particles or even electromagnetic radiation like light. According to general relativity theory, a sufficiently compact mass can deform spacetime to form a black hole. The event horizon is the point beyond which there is no way out. Although it has a huge impact on the fate and circumstances of an object passing through it, general relativity says it has no locally detectable features. A black hole, in many ways, resembles an ideal black body because it does not reflect light.Furthermore, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation with the same spectrum as a black body with a temperature that is inversely proportional to its mass. For stellar black holes, this temperature is on the order of billionths of a kelvin, making direct observation essentially impossible.Objects with gravitational fields that are too strong for light to escape were first considered by John Michell and Pierre-Simon Laplace in the 18th century. Karl Schwarzschild discovered the first modern solution to general relativity that would characterise a black hole in 1916. In 1958, David Finkelstein published the first definition of a "black hole" as a region of space from which nothing can escape. Black holes were long thought to be a mathematical curiosity; it wasn't until the 1960s that theoretical work demonstrated that they were a generic prediction of general relativity. Jocelyn Bell Burnell's discovery of neutron stars in 1967 sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality. Cygnus X-1 was the first black hole discovered, and it was discovered independently by several researchers in the year 1971. When massive stars collapse at the end of their lives, black holes of stellar mass form. After forming, a black hole can expand by absorbing mass from its surroundings. By absorbing other stars and merging with other black holes, supermassive black holes of millions of solar masses (M) may form. The existence of supermassive black holes in the centres of most galaxies is widely accepted.
Here Are More Interesting Facts About Black Holes