A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing not even particles. source
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing not even particles.
The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. source
The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
In many ways a black hole acts like an ideal black body, as it reflects no light. source
In many ways a black hole acts like an ideal black body, as it reflects no light.
This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe. source
This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe.
The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916. source
The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916.
Black holes were long considered a mathematical curiosity; it was during the 1960s that theoretical work showed they were a generic prediction of general relativity. source
Black holes were long considered a mathematical curiosity; it was during the 1960s that theoretical work showed they were a generic prediction of general relativity.
Black holes of stellar mass are expected to form when very massive stars collapse at the end of their life cycle. source
Black holes of stellar mass are expected to form when very massive stars collapse at the end of their life cycle.
After a black hole has formed, it can continue to grow by absorbing mass from its surroundings. source
After a black hole has formed, it can continue to grow 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. source
By absorbing other stars and merging with other black holes, supermassive black holes of millions of solar masses (M☉) may form.
There is general consensus that supermassive black holes exist in the centers of most galaxies. source
There is general consensus that supermassive black holes exist in the centers of most galaxies.
Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. source
Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light.
If there are other stars orbiting a black hole, their orbits can be used to determine the black hole's mass and location. source
If there are other stars orbiting a black hole, their orbits can be used to determine the black hole's mass and location.
On 15 June 2016, a second detection of a gravitational wave event from colliding black holes was announced. source
On 15 June 2016, a second detection of a gravitational wave event from colliding black holes was announced.
Any two black holes that share the same values for these properties, or parameters, are indistinguishable according to classical (i.e. non-quantum) mechanics. source
Any two black holes that share the same values for these properties, or parameters, are indistinguishable according to classical (i.e. non-quantum) mechanics.
The simplest static black holes have mass but neither electric charge nor angular momentum. source
The simplest static black holes have mass but neither electric charge nor angular momentum.
