What is the maximum density of the universe 5

The average density of our universe is about: 1*10 -28 kg cubic meters.

If you're asking about the largest mass of an object in the universe, it's a black hole.

According to the Schwarz radius, the minimum volume-to-density ratio of a black hole is:

r/m=2g/c^2

And because the relationship between the mass of the sphere and the density and radius is:

m=4nur 3 3 (n pi, u is the average density of matter).

Therefore, the relationship between the radius of a black hole and the lowest density is:

r^2=3c^2/8gnu=1·61*10^26（1/u）

Specific inferences: 1. The density of the earth is known to be: u=3·34*10 6 kg cubic meters, which is obtained by the above formula:

r=6·94*10 9 m.

That is to say, when a sphere of density such as the Earth is piled up into a sphere with a radius of seven million kilometers (less than 11 times the radius of the Sun), its surface will make it impossible for light to escape.

2. Let the radius of the universe be 15 billion light years, i.e., 1.42.*10 24 meters, and substitut the relationship between radius and density to obtain:

u=1·14*10 -11 kg cubic meters.

In other words, if the density of our universe reaches 1·14*10 -11 (kilogram cubic meters), it can bend into a supersphere.

3. It is known that the average density of our universe is about: 1*10 -28 kg cubic meters

r=1·27*10 27 meters = 111.3 billion light years.

In other words, if our current observations of the density of the universe are basically correct, then the radius of the universe needs to be 111.3 billion light-years large for it to bend into a supersphere.

White dwarfs have a density of about 1,000,000 g cm3 (the density of the Earth is 10 to the 11th power of a neutron star to the 11th cubic centimeter.

It is about 100,000,000 times larger than a white dwarf.

The density of a black hole is infinity. This is mainly because its size is infinitesimal in size. In fact, regarding the density of black holes, this statement is only the mainstream, and some people believe that there is no matter after the star collapses into a black hole, only high-density dark energy.

The density of the singularity is also infinite, and black holes are also a type of singularity.

At the beginning of the universe, a singularity with zero volume filled all the matter and energy of the universe, its density was infinite, and its temperature was infinitely high.

The maximum density is 10 to the 253rd power of black holes overlapping each other, existing in the two-dimensional strata of the universe, the gravitational pull is too great, and the two dimensions of time and height have disappeared, only length and width.

I've read this question in magazines before, and I really like to read about the universe; At the beginning of the universe, it was a planet like other planets now, and its density was unimaginably large! It seems like 10 grams to the 28th power per cubic centimeter! (I don't remember much for a long time, but it should be about the same, it's very big anyway!)

The big terrible) temperature has also reached a white-hot ten trillion degrees! In this way, this huge universe that has been in a saturated state happened to be big about 15 billion years ago, and then its fragments became the planets it is today, including our earth, the sun, and so on. Because of gravity, the planets formed slowly became like circles.

At the beginning of the universe, it was in a state of high temperature and high density, and then it happened, and after many, many years of evolution, it became our universe today. So, the density at the beginning of the universe was almost infinite.

Thinner than the vacuum that scientists now create in their labs! The universe expands by 5 to 10 per billion years. We are even more accurate in measuring the average density of the universe today.

The expansion process after the big ** is a kind of gravitational force and repulsion force dispute, and the power generated by ** is a kind of repulsion force, which makes the celestial bodies in the universe constantly move away; There is a gravitational attraction between the celestial bodies, which prevents the celestial bodies from moving away and even tries to bring them closer to each other. The magnitude of gravity is related to the mass of the celestial body, so whether the universe will continue to expand or will eventually stop expanding and shrink and shrink in turn depends entirely on the density of matter in the universe. Theoretically, there is some kind of critical density.

If the average density of matter in the universe is less than the critical density, the universe will continue to expand, which is called the open universe; If the average density of matter is greater than the critical density, sooner or later the expansion process will stop and contract with it, which is called a closed universe. The problem seems simple, but it's not. The theoretically calculated critical density is 5 10 30 g cm3.

But it is not so easy to determine the average density of matter in the universe. There is a vast intergalactic space between galaxies, and if the mass of all the luminescent matter observed so far is spread evenly over the entire universe, then the average density is only 2 10 31 grams cm3, which is far below the critical density mentioned above. However, there is evidence that there is still so-called dark matter in the universe that has not yet been observed, and its number may far exceed that of visible matter, which brings a great deal of uncertainty to the determination of average density.

Therefore, whether the average density of the universe is really less than the critical density is still a matter of debate. However, for now, the possibility of an open universe is higher. What is known to mankind now:

First, in the 20th century, white dwarfs were discovered, which are substances created by atoms being pressed together in a dense manner. Then there are neutron stars (pulsars), which are when matter is pressed closer together, causing the atomic structure to break up, and protons and electrons to neutralize to form neutrons and form them together with the original neutrons. There is also something called "exotic matter" (which remains in the theoretical stage for the time being), which is a substance formed by exotic quarks, upper quarks, lower quarks, and electrons, which can be seen as a broken neutron structure and is denser.

Finally, of course, there are the well-known black holes, so matter is concentrated on the "singularity" of infinitely small volumes, and the natural density is infinite.

Density of cosmic stars The density of cosmic stars varies greatly. In the solar system, the average density of the sun is 10 kilograms, the density of the earth is the largest, about 10 kilogram meters, the density of Mercury and Venus is slightly smaller than that of the earth, the density of Mars is only about 3 4 of the earth, and the density of Saturn is the smallest, only 1 8 of the earth. Some stars are very dense, for example, there is a group of stars called white dwarfs, which are 100,000 to 10 million times denser than water, up to 10 kilograms to 1010 kilograms, and the mass per cubic meter is several hundred kilograms to several tens of tons.

There is also a type of star with a greater density called neutron stars, a neutron star with a mass similar to the sun, with a diameter of only 20 km to 40 km, a density 10 trillion to 100 million times greater than water, reaching 1,016 kilogram-meters to 1,019 kilogram-meters, and the mass per cubic meter reaches 10 billion tons. Neutron stars may not yet be the densest stars, according to scientists, there is a type of star called black holes, which are much denser, a black hole equal to 10 solar masses, with a half-diameter of less than 30 kilometers. No matter (including light) in a black hole can come out, and from the outside world, nothing can be seen, hence the name black hole.

There are also some stars that are very low-density, such as the Zodiac Four Stars, which are very large, with a diameter of 360 times that of the Sun and a density of about 1/1 million of water.

The average density is only 2 10 31 grams cm3

The density is infinitesimal and the heat is infinitely low.

The density at the beginning of the universe was almost infinite.

Summary. The hottest star in the universe is WR102 "The star with the highest known surface temperature is WR102, which is a Wolf-Layet star located in the constellation Sagittarius, with a luminosity of nearly 90,000 times that of the Sun, but only seven times the mass of the Sun, and the star that can be seen in the telescope is basically just a nucleus, which is already very small, only 23% of the diameter of the Sun, and only a few tenths of the Sun's volume, but its surface temperature is estimated to reach 200,000 degrees Celsius, which is 36 times the surface temperature of the Sun.

Hello, I'm glad to answer for you, kiss Bi argue, the volume of the universe is 32 cubic light years Oh! The volume of the sphere is equal to 4 3 vultures cube. 4 3 times multiplied by 43.5 billion light years cube is equal to the 32nd power of the absence of the main side of the light year.

So, the volume of the universe is about 32 cubic light-years.

What is the volume of the Milky Way?

Dear, the volume of the Milky Way is about 100,000 light years, and the volume of the half-scum hand diameter is 50,000 light land cave years (50,000 * 365 * 24 * 3600 * 300,000 * 300,000) * about cubic kilometers.

What is the volume of the solar system?

The volume of the solar system is "10 18 cubic kilometers (130 0000 times that of the Earth)."

What is the volume of the Earth?

Dear, the volume of the earth is.

What is the volume of the Earth's core?

The volume of the Earth's core is about 7.6 billion cubic kilometers, which is equivalent to 1,146 of the entire Earth's volume, that is.

Which star is the hottest star in the universe?

The hottest star in the universe is wr102 "The star with the highest known surface temperature is wr102, which is a Wolf-Laye star located in the constellation Sagittarius, with a luminosity of nearly 90,000 times that of the sun, but the mass is only seven times that of the sun, and the star that can be seen in the astronomical telescope is basically just a star nucleus, which is already very small, only 23% of the diameter of the sun, and only a few tenths of the sun, but it is estimated that the temperature of its surface can reach 200,000 degrees Celsius. It is 36 times the temperature of the sun's surface.

Which star is the hottest star in the universe?

The hottest star in the universe is V688 Monocerotids"The hottest star at the moment, this laurel belongs to V688 Monoceros, a carbon-dense star with a spectrum of C5,9E, with a surface temperature of only 1670 K[1], which is light-years away from the Earth.

Which substance is the densest in the world?

1.On Earth, the densest is osmium metal, which has a density of but in the vast universe, osmium metal is simply a small point in the "density family". The white dwarfs in the sky are not very large, but they are surprisingly dense, 36 million to hundreds of millions of times the density of water.

In the same year, astronomers used telescopes to discover neutron stars, which are as dense as a piece of neutron star material the size of a matchbox, with a mass of 3 billion tons, and it takes more than 96,000 heavy locomotives to pull it.3There is also a new celestial body in the universe, which is denser than a neutron star, up to, which is very attractive to other objects, as long as it is attracted by it, it will be swallowed, and even light will not be spared, because it does not emit light, people have given it the image name "black hole".

It is now recognized as a neutron star. On a neutron star, the protons and neutrons of the nucleus are pressed into neutrons by a strong gravitational force, which means that the elementary particles on the neutron star are only neutrons! Neutron stars have a density of 10 to the 11th power of kilograms, cubic centimeters, which is a massive mass of 100 million tons per cubic centimeter!

A piece of cut cake is one square.

A cart of cake cutting for a suite.

The largest object in the universe is the cake cut.

I don't know, it's a diamond.

The average density of the universe is about: 1*10 -28

kilograms cubic meters (at present, it is only a relatively authoritative estimate, and it is impossible to be very accurate).

This density is slightly less than the threshold, so our universe is still expanding.

Third place is the neutron star. What is a Neutron Star? Matter is made up of atoms, and when the electrons in the atoms are compressed into protons due to some powerful force, they become neutrons.

It can be seen that the density inside the neutron is very high, and the neutron star is precisely a huge atomic nucleus composed of a large number of neutrons, and its density is even higher than the density of the nucleus itself. As far as is known, the mass of the lowest density neutron star can reach 80 million tons per cubic centimeter, and the mass of the highest density neutron star can even reach about 2 billion tons per cubic centimeter. High quality corresponds to a strong gravitational pull.

Therefore, neutron stars also have extremely high rotational speeds.

It takes about 24 hours for our Earth to rotate around in one cycle, which is what we call a day and night, while a neutron star can make dozens of revolutions, hundreds, or even thousands of revolutions in just one second. Although the rotation speed is fast, it is not chaotic at all, and among many celestial bodies, the rotation of neutron stars can be said to be quite stable. And it is precisely because of the extremely high rotational speed of neutron stars that we are able to detect their existence in the vast universe.

Because at high rotational speeds, the powerful electromagnetic waves emitted by the poles of neutron stars will periodically sweep the universe, and we can detect them when they pass by the Earth. So how are neutron stars formed? In fact, the predecessor of a neutron star is a star.

At the end of a star's life, due to the weakening of the nuclear fusion reaction, the strong gravitational pull of the star's inner core will cause the star's outer material to collapse inward, and the rapid collapse of the external matter will cause the star's inner core to suffer a powerful impact, and the atoms of the star's inner core will begin to be compressed into neutrons under the action of huge gravity. Eventually, neutron stars are formed in the middle of the stars. The third-ranked neutron star is already so powerful, so who will be in second place?

The second place is the quark star. This name is relatively unfamiliar to most people, but to put it simply, neutrons are formed due to the compression of atoms, and quarks are formed by the continued compression of neutrons. In other words, quarks are denser than neutrons, so quark stars are naturally denser than neutron stars.

If a neutron star is a giant nucleus, then a quark star is a giant neutron. Therefore, the high-density quark star naturally has a more exaggerated external performance. Although quark stars are extremely dense, they are still in the realm of what we can understand.

And the number one guy, its density has reached an incomprehensible level, and this number one is the black hole that we are all very familiar with. Black holes are also formed by the collapse of massive stars, but the density of black holes is so high that they exist in a very different form from the first two. Although we don't know exactly what the inside of a black hole looks like, scientists generally believe that the inside of a black hole is just a singularity, so the matter that is sucked into the black hole is concentrated in this incomprehensibly dense dot.