Black Hole in a sentence

The entropy of a black hole is proportional to the surface area of the black hole's event horizon. citationcitationcitation Jacob Bekenstein and Stephen Hawking have shown that black holes have the maximum possible entropy of any object of equal size.

Astronomers have found that when a star approaches an average black hole, it is initially trapped in orbit around the black hole.

While the entry into a black hole depicted in the movie may not be accurate, there is a slim possibility that in a big enough black hole, a traveler could potentially send a message, according to some scientists.

One, a "serial killer" black hole, is about to devour its second star within five years, while the other, part of the newly discovered triple system V404 Cygni, has disrupted long-held theories of black hole formation.

Supermassive Black Hole Has Been Caught Eating 6 Galaxies This could explain how such a young black hole got to be so big.

It’s titled “Black Hole Entropy and Soft Hair,” co-authored with Sasha Haco, Malcolm J. Perry, and Andrew Strominger, about the black hole information paradox.

Black hole entropy is deeply puzzling — it says that the logarithm of the number of states of a black hole is proportional to the area of the horizon, not the volume in the interior.

Consequently, the physics of matter forming a supermassive black hole is much better understood and the possible alternative explanations for supermassive black hole observations are much more mundane.

For instance, by the second law of black hole mechanics, the area of the event horizon of a general black hole will never decrease with time, analogous to the entropy of a thermodynamic system.

If there are other stars orbiting a black hole, their orbits can be used to determine the black hole's mass and location.

One possibility for observing gravitational lensing by a black hole would be to observe stars in orbit around the black hole.

Susskind 2008 The AdS/CFT correspondence resolves the black hole information paradox, at least to some extent, because it shows how a black hole can evolve in a manner consistent with quantum mechanics in some contexts.

The temperature of this thermal spectrum ( Hawking temperature ) is proportional to the surface gravity of the black hole, which, for a Schwarzschild black hole, is inversely proportional to the mass.

This seemingly causes a violation of the second law of black hole mechanics, since the radiation will carry away energy from the black hole causing it to shrink.

To a distant observer, clocks near a black hole appear to tick more slowly than those further away from the black hole.

When an object falls into a black hole, any information about the shape of the object or distribution of charge on it is evenly distributed along the horizon of the black hole, and is lost to outside observers.

There is also a larger “brightness depression” at the center – basically the donut hole – caused by light and other matter disappearing into the black hole.

Sakharov called such singularities a collapse and an anticollapse, which are an alternative to the couple black hole and white hole in the wormhole theory.

While a black hole sucks everything in, including light, a white hole releases matter and light.

The black holes are about 50,000 times the mass of our Sun, smaller than a supermassive black hole that would inhabit the core of large galaxies, but bigger than the ones formed by the collapse of massive stars.