An interesting story told by Physicist Alan Lightman is that Feynman actually discovered Hawking radiation 1 year before Hawking. According to Lightman , Feynman overheard him and fellow students talking about black holes and immediately became interested in the conversation .
A central law for black holes predicts that the area of their event horizons — the boundary beyond which nothing can ever escape — should never shrink. This law is Hawking's area theorem, named after physicist Stephen Hawking, who derived the theorem in 1971.Jul 1, 2021
In 1976, physicist Stephen Hawking realized that black holes aren't completely black. Due to the weirdness of quantum mechanics, black holes slowly evaporate. This led to a paradox: All the information that falls into a black hole gets locked inside.Dec 2, 2020
That's where Hawking came in. In 1971, he suggested that black holes formed in the chaotic environment of the earliest moments of the Big Bang. There, pockets of matter could spontaneously reach the densities needed to make black holes, flooding the cosmos with them well before the first stars twinkled.Jan 3, 2022
Stephen Hawking worked on the physics of black holes. He proposed that black holes would emit subatomic particles until they eventually exploded. He also wrote best-selling books, the most famous of which was A Brief History of Time: From the Big Bang to Black Holes (1988).Mar 10, 2022
Einstein's theory of general relativity mathematically predicts the existence of wormholes, but none have been discovered to date. A negative mass wormhole might be spotted by the way its gravity affects light that passes by.Jan 13, 2022
Black holes are freezing cold on the inside, but incredibly hot just outside. The internal temperature of a black hole with the mass of our Sun is around one-millionth of a degree above absolute zero.
In general relativity, a white hole is a hypothetical region of spacetime and singularity that cannot be entered from the outside, although energy-matter, light and information can escape from it.
Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. For example, an object falling into the hole would appear frozen in time at the edge of the hole.
While in graduate school, at age 21, Dr. Hawking was diagnosed with Amyotrophic Lateral Sclerosis (ALS), commonly referred to in the U.S. as Lou Gehrig's disease. As ALS progresses, the degeneration of motor neurons in the brain interfere with messages to muscles in the body.
Hawking radiation has never been observed, but if it exists the information lost when objects enter a black hole might be carried out of the black hole via this light. Thus the information isn't truly lost. If Hawking radiation is real, that also means that black holes follow the laws of thermodynamics.Oct 7, 2021
The theory of eternal inflation that Hawking and Hertog put forward is based on string theory: a branch of theoretical physics that attempts to reconcile gravity and general relativity with quantum physics, in part by describing the fundamental constituents of the universe as tiny vibrating strings.Jan 9, 2022