What is the gravitational collapse of a star? Detailed answer

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What is the gravitational collapse of a star? Detailed answer

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What is the gravitational collapse of a star?

Gravitational collapse of a star is a catastrophically fast compression of a massive star under the influence of gravitational forces.

The evolution of stars with a mass of more than 1,5 solar masses can end with a gravitational collapse. After the exhaustion of nuclear fuel, such stars lose their mechanical stability and begin to shrink towards the center with increasing speed.

If the growing internal pressure stops the gravitational collapse, then the central region of the star becomes a superdense neutron star, which can be accompanied by a shell ejection and be observed as a supernova explosion. But if the radius of the star has decreased to the value of the gravitational radius, then no forces can prevent its further contraction and transformation into a black hole.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

How many aggregate states does a substance have?

Three - what could be easier? Solid, liquid or gaseous?

In fact, there are at least fifteen of them, and the list continues to grow almost every day.

Here are our latest "best efforts":

Solid, amorphous solid, liquid, gaseous, plasma, superfluid, supersolid, degenerate matter, neutronium, strongly symmetric matter, weakly symmetric matter, quark-gluon plasma, fermion condensate, Bose-Einstein condensate and strange matter.

If you do not go into incomprehensible (and for most of us, absolutely unnecessary) details, one of the most amusing aggregate states of matter is the Bose-Einstein condensate.

Bose-Einstein condensate (often referred to as "Bose condensate", or simply "back") occurs when you cool a chemical element to extremely low temperatures (usually just above absolute zero, minus 273 degrees Celsius). , is the theoretical temperature at which everything stops moving).

This is where strange things begin to happen to the substance. Processes normally seen only at the atomic level are now taking place on scales large enough to be observed with the naked eye. For example, if you place a "back" in a beaker and provide the desired temperature, the substance will begin to crawl up the wall and eventually get out on its own.

Apparently, here we are dealing with a futile attempt by the substance to lower its own energy (which is already at the lowest of all possible levels).

The theoretical possibility of the existence of a Bose condensate was predicted by Albert Einstein back in 1925, after studying the work of Shatyendranath Bose, but it was only possible to obtain it experimentally in 1995 in America - for this work, its creators were awarded the Nobel Prize in Physics in 2001. The very same manuscript of Einstein, considered lost, was discovered only in 2005.

Test your knowledge! Did you know...

▪ What metal is most abundant in the earth's crust?

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