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Space

How large is the universe and how did it spawned.

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Space, space or universe is 

the vast, endless area during which numerous celestial bodies (including the Earth) are found. It moves along paths determined according to physical laws.
In fact, the Universe (as the name suggests) is everything that exists. It’s space, time, matter (visible and invisible), energy, planets, stars, galaxies, and the content of the intergalactic space.

The size of it is probably never to be accurately determined. It may simply be infinite.
Even if it is final, it would have no center or boundaries. But would be turned around itself (like a balloon surface).

Our findings relate only to the part of the universe. Those can be seen from the Earth. This visible universe is a spherical area around the Earth. Light has reached us from the creation of the universe (13.7 billion years ago) to this day. According to the latest findings, the radius of the visible Universe amounts to an incredible 46 billion light years, and the diameter is 92 billion light-years.

To remind, the nearest neighbor Proxima (Alpha) Centauri is only 4.3 light-years away. The fastest modern spacecraft would take about 40,000 years (at speeds of around 30-35 km/sec) get to it! The part of the universe seen from the Earth contains about 100 billion galaxies. Depending on the size, has between 10 million and 1000 billion stars. Thus, it is estimated that the total number of stars in this range is about 7 trillion billion stars. In addition to the visible “bright” matter, studies show that the universe must also consist of a large amount of dark matter. It is most likely in the form of dark planetary-like bodies, very small particles as the neutrino, and so on.

In fact, it is thought that 80% of the total matter in the universe constitutes the dark matter. The remaining 20% is the “ordinary” visible matter. In order to directly prove the existence of dark matter, a number of laboratory searches and experiments on appropriate particles are underway, usually in deep mining windows.

Astronomical observations have shown that the universe spreads rapidly and evenly in all directions. With the galaxies drifting apart (as a balloon inflating). It has been observed that as much of a galaxy is farther away from us, the greater the speed of its distancing. Thus, the farthest galaxies that can be seen at all with telescopes are moving away at great speeds close to the speed of light. That’s why it is said that the universe is in the expansion-expansion phase, which began with its creation at the Big Bang 13.7 billion years ago. Then, in a fraction of a second, from the infinitely dense and inconceivably hot Universe, the first fundamental particles were created, and its diameter from billions of parts of mm increased to several light years.

After several hundred thousand years, these particles built the first atoms. The diameter of the universe reached 100 million light-years. The first galaxies have begun to emerge for several million years, while the Universe has reached a diameter of about a billion light-years. Thus, gradually over time, today’s structure and size have been created.

What happened before the Big Bang (which, in fact, was not a typical explosion, but an abrupt expansion of the universe from an infinitesimal point) and what evolution would be like, is likely to remain the subject of speculation and theories for a long time.

However, two scenarios are predominant. Those depend on the density of matter and energy in the universe. If that density is greater than critical, gravity will prevail, and after a few tens of billions of years will come to the “Great Clamping”, and the Universe will end as it began – at an unimaginably small point.

Perhaps at some point later, a new Big Bang will appear again and a new universe will be created. Thus, cycles of spreading and clamping will change forever. If the density is smaller than the critical one, in the future, the universe will continue to expand and cool, and after tens of billions of years it will end as a huge, dark ice space.

The uncertainty about which scenario will prevail is because the amount of matter and energy in the universe is still unknown to assess whether it is above or below the critical density. This is because it is considered that the participation of ordinary, visible matter seen with telescopes is quite small in relation to the dark matter and dark energy

(whose nature is unknown to us, which affects the accelerated spread of the Universe). However, with the end of this universe that we know, whether it will be through the “Great Clamping” or “The Great Frost”, the whole living world in it will inevitably die out. It is interesting that some cosmologists consider it possible that there are other universes parallel to ours, but at least according to current knowledge, it can never be proven or deny.

About Nikola

1 Comment

  1. Len Gibney

    January 13, 2019 at 4:40 pm

    Here in the UK they showed in a TV experiment how spacetime is infinite by use of the MBR

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