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The chronology protection conjecture is a hypothesis first proposed by Stephen Hawking that laws of physics beyond those of standard general relativity prevent time travel—even when the latter theory states that it should be possible (such as in scenarios where faster than light travel is allowed).
Stephen Hawking and the Theory of Everything (2007) Stephen Hawking: Master of the Universe (2008) [431] Into the Universe with Stephen Hawking (2010) [432] Brave New World with Stephen Hawking (2011) [433] Stephen Hawking's Grand Design (2012) [434] The Big Bang Theory (2012, 2014–2015, 2017) Stephen Hawking: A Brief History of Mine (2013) [435]
According to John Horgan, science journalist writing for The Wall Street Journal, Hawking, in his book, prefers string theory as a way of explaining the "theory of everything" (which Hawking predicts to be solved by "the end of this century") and, based on quantum mechanics, considers empty space as filled with virtual particles, "popping into ...
Stephen Hawking's purported solution to the black hole unitarity paradox. Hawking and unitarity: a July 2005 discussion of the information loss paradox and Stephen Hawking's role in it; The Hawking Paradox - BBC Horizon documentary (2005) "Horizon" The Hawking Paradox at IMDb A Black Hole Mystery Wrapped in a Firewall Paradox
Model-dependent realism is a view of scientific inquiry that focuses on the role of scientific models of phenomena. [1] It claims reality should be interpreted based upon these models, and where several models overlap in describing a particular subject, multiple, equally valid, realities exist.
An objection to the practicality of building a Tipler cylinder was discovered by Stephen Hawking, who argued that according to general relativity it is impossible to build a time machine in any finite region that satisfies the weak energy condition, meaning that the region contains no exotic matter with negative energy. The Tipler cylinder, on ...
The Hawking singularity theorem is based on the Penrose theorem and it is interpreted as a gravitational singularity in the Big Bang situation. Penrose shared half of the Nobel Prize in Physics in 2020 "for the discovery that black hole formation is a robust prediction of the general theory of relativity".
Hawking radiation is black body radiation released outside a black hole's event horizon due to quantum effects according to a model developed by Stephen Hawking in 1974. [1] The radiation was not predicted by previous models which assumed that once electromagnetic radiation is inside the event horizon, it cannot escape.