BLACK HOLES

Black Hole A black hole is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it. Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of no escape is called the event horizon. A black hole has a great effect on the fate and circumstances of an object crossing it, but it has no locally detectable features according to general relativity. In many ways, a black hole acts like an ideal black body, as it reflects no light. 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 of the order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly.
https://www.youtube.com/watch?v=zOoJAgLB8As
Black Holes: When Space and Time Surrender - The Most Powerful Object in The Universe
https://www.youtube.com/watch?v=VN8JXWpgFqM
The Fascinating Science Behind Black Holes
https://www.youtube.com/watch?v=Kk2qd6krrYo
2 Hours Of Earth, Solar & Space Facts To Fall Asleep To
https://www.youtube.com/watch?v=yMRYZMv0jRE
Inside Black Holes | Leonard Susskind
https://www.youtube.com/watch?v=nw1rL2O0YWA
Hawking Radiation: The Cosmic Breakthrough That Challenges Everything We Know About Our Universe