Physics
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Universe
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Black hole
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Unsolved problems
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Matter
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Physical paradox
Physical cosmology
Cosmology
Concept
Open problem
Manifold
Fundamental physics concepts
Paradox
General relativity
Concepts in physics
Pseudo-Riemannian manifold
Gravitational singularity
A gravitational singularity or spacetime singularity is a location where the quantities that are used to measure the gravitational field become infinite in a way that does not depend on the coordinate...
Naked singularity
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Black hole
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Hawking radiation
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Entropy
Thousands of Black Holes May Exist At The Center Of Our Galaxy
Thousands of Black Holes May Exist At The Center Of Our Galaxy.
Something Big Came OUT Of A Black Hole Recently! Scientists Baffled 3/15/16
You don’t have to know a whole lot about science to know that black holes normally suck things in, not spew things out. But NASA detected something mighty bizarre at the supermassive black hole Markar...
"The Black Hole Paradox" --New Theory Says Soon After Big Bang, Black Holes Lit Up the Universe
Soon after the Big Bang, the universe went completely dark. The intense, seminal event that created the cosmos churned up so much hot, thick gas that light was completely trapped. Much later—perhaps a...
Gamma-Ray Blazars Powered By Billion-Solar-Mass Black Holes Found
Using the Fermi Gamma-ray Space Telescopes, astronomers found 5 early universe gamma-ray blazars. Two of them were powered by “billion-solar-mass” black hole...
Astronomers find a ‘nearly-naked’ supermassive black hole
A close galactic encounter gave these astronomers an interesting discovery
The case for black holes being nothing but holograms just got even stronger
If anything can sum up just how little we truly know about the Universe, it’s black holes. We can’t see them because not even light can escape their gravitational pull, we have no idea what they’re ma...
X-ray Echoes Map a Black Hole’s Disk
Some 3.9 billion years ago in the heart of a distant galaxy, the tidal pull of a monster black hole shredded a star that wandered too close. X-rays produced ...
Soft hairs help resolve the black-hole information paradox
Stephen Hawking and colleagues claim partial solution to 40-year-old puzzle
Could black holes be the dark matter everyone has been looking for?
As we wait for more LIGO results, a maverick theory pops up
Something Big Came OUT Of A Black Hole Recently! Scientists Baffled 3/15/16
NASA-just-saw-something-come-out-black-hole-first-time-ever .
After Black Holes Collide, a Puzzling Flash
A surprising flash that accompanied a black hole collision is leading physicists to rethink what black holes can do.
Are We Living in a Black Hole?
Some astrophysicists think our universe owes its origin to a monster black hole, wherein we reside today.
Astronomers glimpse black hole in glow of the Big Bang
A rare view into conditions in the early Universe.
Black hole sun could support bizarre life on orbiting planets | New Scientist
A black hole sun could be friendlier than you might expect. Planets orbiting a black hole – as they do in the film Interstellar – could sustain life, thanks to a bizarre reversal of the thermodynamics...
New Paper Asserts That Life Could Survive On A Planet Orbiting A Black Hole
Living on a planet orbiting a black hole might be a reality in our future. According to the second law of thermodynamics, life requires a temperature difference to provide a source of useable energy. ...
Milky Way's Second Most Massive Black Hole Found?
This massive black hole candidate may be of the 'intermediate-mass' variety, possibly tying up a perplexing astrophysical puzzle.
Naked singularity
In general relativity, a naked singularity is a gravitational singularity without an event horizon. In a black hole, the singularity is completely enclosed by a boundary known as the event horizon, in...
Black hole
A black hole is a mathematically defined region of spacetime exhibiting such a strong gravitational pull that no particle or electromagnetic radiation can escape from it. The theory of general relati...
Black hole - Wikipedia
Hawking radiation
Hawking radiation is black body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon.It is named after the physicist Stephen Hawking, who provided a...
Entropy
In thermodynamics, entropy (usual symbol S) is a measure of the number of specific ways in which a thermodynamic system may be arranged, commonly understood as a measure of disorder. According to the ...
Entropy - Wikipedia
Black hole thermodynamics
In physics, black hole thermodynamics is the area of study that seeks to reconcile the laws of thermodynamics with the existence of black hole event horizons. As the study of the statistical mechanic...
Black hole thermodynamics - Wikipedia
Reverberation mapping
Reverberation mapping is an astrophysical technique for measuring the structure of the broad emission-line region (BLR) around a supermassive black hole at the center of an active galaxy and estimatin...
Near-extremal black hole
In theoretical physics, a near-extremal black hole is a black hole which is not far from the minimal possible mass that can be compatible with the given charges and angular momentum. The calculations ...
Entropic explosion
An entropic explosion is an explosion in which the reactants undergo a large change in volume without releasing a large amount of heat. The chemical decomposition of triacetone triperoxide (TATP) is a...
Quantum relative entropy
In quantum information theory, quantum relative entropy is a measure of distinguishability between two quantum states. It is the quantum mechanical analog of relative entropy.
For simplicity, it w...
Rotating black hole
A rotating black hole is a black hole that possesses angular momentum. In particular, it rotates about one of its axes of symmetry. This seems paradoxical in regards of the time slow down near the bl...
Nucleate boiling
Nucleate boiling is a type of boiling that takes place when the surface temperature is hotter than the saturated fluid temperature by a certain amount but where the heat flux is below the critical hea...
Nucleate boiling - Wikipedia
Sackur-Tetrode equation
The Sackur–Tetrode equation is an expression for the entropy of a monatomic classical ideal gas which incorporates quantum considerations which give a more detailed description of its regime of validi...
Black brane
In general relativity, a black brane is a solution of the equations that generalizes a black hole solution but it is also extended —and translationally symmetric— in p additional spatial dimensions. T...