Black Holesstatistical fluctuationsupper boundHubble horizonAccording to the third law of Thermodynamics, it takes an infinite number of steps for any object, including black-holes, to reach zero temperature. For any physical system, the process of cooling to absolute zero corresponds to erasing ...
From that of a distant observer, we never see anything fall into the black hole, i.e., enter the event horizon. The object approaching the event horizon would simply fade away over time and ultimately disappear. However, from the point of view of an observer falling into the black hole,...
How would a black hole wormhole work? The answer is actually relatively simple, and it also reveals why such a wormhole would have a detectable physical “tell.” Space's Charles Q. Choi explains: “Any matter falling into a mouth of a supermassive wormhole would likely travel at extraordina...
Entering the cave varies for both experiences. For guests on the Black Abyss, we enter the cave via a 35-metre abseil and then a short zip-line journey through the pitch-black cave. For guests on the Black Labyrinth, entering the cave is simply through a hole in the rock formation. Wha...
A black hole is an object with a gravitational field so powerful that a region of space bees cut off from the rest of the universe – no matter or radiation including visible light that has entered the region can ever escape. The lack of escaping electromagic radiation renders ...
General relativity is a physical theory about space and time and it has a beautiful mathematical description. According to general relativity, the spacetime is a 4-dimensional object that has to obey an equation, called the Einstein equation, which explains how the matter curves the spacetime. ...
A galaxy is a large group of stars that orbit around a common point, usually a Supermassive Black Hole. Some galaxies, such as the dwarf Galaxy called Segue 2, do not have a Supermassive Black Hole but rather orbit a central gravitational point. The word galaxy comes from the French wo...
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A bright quasar, captured as it was just a billion years after The Big Bang, has been revealed as a cluster of six different galaxies around an immense, and growing, supermassive black hole. 'Quasar' is short for 'quasi-stellar object'. It...
However, this possibility is usually rejected on simple physical grounds—there are no magnetic monopoles found in nature so far. Because GR is time-symmetric, there is also a past event horizon. It is the boundary of a so-called “white-hole region”, that is, a spacetime region into ...