Review: Welcome to the Universe, Neil deGrasse Tyson et al | THE Books

There are three possible types of universe expansion. Open, flat and closed universe. If our universe is open then the expansion will continue forever. If it is flat, then it will be extended forever. But the expansion rate will be almost near zero after infinite time.

Again, if our universe is in the third category, then it will stop its expansion once and itself and will be interconnected and we will face a new big bang. In these three cases, the expansion rate for the gravitational force will be reduced.

Now our main thing is to know what kind of a universe our universe actually is.

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How can we understand the consequences of our universe? Omega (Ω) is one of the three important factors influencing the result of the universe. From this we get an idea of ​​the average density of the universe's material.

Here the density of the universe is known as the density of the substance that is made of the whole universe. The greater the volume of matter the universe will be as thick as it is, and with it the stronger tension of gravity to stop the extension.

If the universe is high density, it will contain enough substances to stop the extension and push it to the shrinkage-the universe will be closed. And the less density of universe is reasonably free - which will continue to grow continuously for ages.

Then there is a density in the middle of which the universe will never expand. This concentration junction or tropic density. The expansion of the universe is dependent on this important component called 'Trinity Density'.

The concentration of the condensation is that the concentration of which the universe's expansion will be created by stopping the collapse zone. Its value is moving between 4.5 x 10 ^ -30 grams to 18 x 10 ^ -29 grams per cubic centimeter.

The real density of the universe and the ratio of the tropic density is the omega (Ω). If the omega value is less than 1 (Ω <1) then the universe will be open. And if the omega value is greater than 1 (Ω> 1) then the universe will be closed or concave And if the omega standard is completely 1 (Ω = 1) then it will be the parallel universe.

The extent of the expansion will gradually be expanded even after it decreases gradually. So 1 is the omega border value.

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But if we do not know the actual density of the universe, it is not possible to say that our universe is actually what kind of Scientists calculate the density of all known galactic substances, which is found to be 4 percent of the tropical concentration. If this value is correct then omega is far less than standard 1.

So what is our universe open? Due to the dark matter being associated with our known material, it was not easy anymore. Scientists now believe that this dark matter is not more than 23 percent of the total mass of the universe;

But during the emergence of the universe, about 80 to 90 percent of the substances were such invisible bodies. If there are still some invisible materials, then the vast areas of space that we think are empty are not 'zero' in that sense.

If this is true, then the omega value can be larger than 1. In that case, the expansion of the universe may be stopped once the transition of the universe starts to stop.

What happens if the universe is shrinking? When it comes to constriction, look at the galaxy in the neighborhood, and then the red fill can not be seen, instead of the bluefish fraction.

Due to the deterioration of the density of the substance between themselves, the temperature will increase gradually.

Then, for the time being, the universe was expanding, the same universe would collapse, and again, it will return to that initial state, from which time the Big Bang was started! The final fall of the universe has been named the Great Syndrome.

But scientists are still considering this super-relation as a mere idea. Strong evidences for the Big Bang have long been available - but the fact of the Great Depression is uncertain;

The great contraction is still hypothesis - and the 'hypothesis' is actually 'seen' so far for just about a hundred to three to four percent of the amount of substances needed to be in the universe to make the hypothesis a reality (i.e. 1).

Most scientists today think so that the possibility of this 'bounce' or mahasankachana happening is very less.

They think the universe may be expanding continuously and it will end with 'Big Fries' or 'Thermal Death'.

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Scientists knew that if the gravitational force is active on the universe, then according to Einstein's theory, the expansion of the universe should be reduced gradually.

The total power of the universe will gradually bring about gradual increase in its gravity, it is normal. As if throwing a stone upward, the higher it gets, its velocity decreases the gravity pulls.

That's a lot of things. While researching the supernova explosion, scientists found that the expansion of the universe is not actually decreasing, but rather rapidly increasing.

There is a dark anti-gravity dark energy behind this expansion of the universe. This dark energy is one of the main components of our universe. Most scientists think that this dark energy is hidden in our known spaceships.

Many scientists believe that this dark energy comes from a different field (something like electrocardiogram or gravitational field). This field is not fixed, but rather dynamic. Along with the expansion of the universe it gradually changes. Its name is quintessence.

To understand the quantitative evolution of intelligence with this quintessence, scientists have made a variety of mathematical calculations.

One such amount is 'Status-Equation Variable'. It's basically the power of intelligence and its density of power.

This ratio is expressed through w. Scientists are now trying to create a successful picture of the universe's ultimate consequence for us through the variation and loss of this ratio.

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Then we have a kind of energy in this universe, whose source is 'still unknown'. It can be the source of vacuum energy, or something like quintasses.

Is this dark energy like 'speed' like quintessence or 'stabilized' like vacuum energy? This is not yet known. But this power is repulsive. As a result, this energy is not helping to limit the universe, but increasing the rate of expansion gradually increases.

If the rate of expansion increases as such, then what will be the consequences of the universe? If the proliferation continues to grow, the galaxies will move away from each other - and the sources of light will be swept away in the dark once; That is, the future of the universe is literally dark! If we have the calculation of 'status-equation variable' above, then the condition of w is equal to -1.

The cosmic observations of ours today give the verdict of such consequences. If this result is true, then in today's one to two trillion years, we will not be able to observe any galaxy other than galaxy galaxies.

Ultimately, the stars of all the universe will burn down. Space will leave dark and cold in a deserted state. Scientists named the result as Mahasatiya or 'Big Chil'.

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Again if the value of w is less than -1, then more negative (such as w = - 1.15), then it will create another type of extreme consequence. The effects of dark energy will increase with time. Expansion will be increasingly unimaginable.

As a result, the expansion in the two billion years will increase so much that this outward expansion will literally shatter the galaxies at a time; The stars will tear off, tear off the planets, will tear our solar system and eventually tear them into the material of all classes.

Even atoms will be torn off 10 ^ -19 seconds before the end time. This doctrine is called the Big Rip or the 'Extortion'. If the value of w is greater than -1, that means less negative (such as w = - 0.85 or something like this), then once the universe is expanding, it may end up in a big mishap or 'Big Chill' as before.

But it may also happen that after a long time, this dark energy stagnation slowed down, and once again the state of the immobilized substance And in this context, the nature of the geometry of the universe, the dark state of dark energy and the abundance of substances, and the effects of gravitational attraction force can all come back to the great depression again.

Believe in Yourself by @eliashossain

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