Is there a beginning and an end in the world? Does the universe have boundaries?

In the universe, there is no meaning of time and distance, that is, infinite, we measure by time and distance, because we are finite, including the earth, the sun, and human beings, are limited, and the total universe is infinite, in the development of the universe, all our matter is only its course, including all the matter in the universe, if measured by time, distance will be a big number, and the universe is like this.

Time is just a unit of measurement. For the universe, it is he who is developing.

If the universe is great, then time begins to be great.

And continue as it is now. until all the energy is consumed.

Just like a human being ...

Time is the measure of a person's life ...

At present, this question is only in the realm of pure theory, and the scientific community has not yet reached a conclusion. If you like this, let's study hard in this area......

More than 10 billion years ago, there was no current universe, no time and space, only a so-called "singularity" that was too small to be small, for some reason, at a certain moment, this singularity **, so time began, space formed... After how many billions of years, the solar system was formed, the earth was formed, and then life was born, and after how many tens of thousands of years, human beings appeared, civilization began, and after that, how many years have passed, and there is a child here who asks "Does time have a beginning and an end?" Does the universe have boundaries? And then I don't know that after a few decades, this child can't escape the cycle of nature... No, none of us are gone! The cycle goes on and on from generation to generation ...

Finally, one day, the sun has come to the end of its life, it is about to burn out the fuel in its body, it has become a red giant, the earth is about to melt, it has become uninhabitable for human beings, it has become a hellish planet, what about human beings? Maybe moved to another planet, maybe it died out many years ago ...

Why how many billions of years ago? Years are just a unit of measurement on Earth, and who knows how big the universe is? How long does solar energy burn (it can't be calculated in years)?

Yes !The formation of the universe, the current theory is that the universe is big**, and the birth of the universe is the beginning of time, and it continues to expand like this until the energy is exhausted!

The universe is finite and boundless!There is only so much matter in the universe that it is finite; But it's boundless, like our earth. Because, gravity will make you unable to see anything outside the universe!

Because the so-called universe is all the worlds that we don't know, and we don't know anything outside the universe, so it is also the universe, so there is no boundary.

Everything has a beginning and an end.

There is life and death, there is a beginning and an end.

The universe also has boundaries. Outside the universe, we may see nothingness, or we may see another "anti-universe". We all know that the vast universe has always been one of the goals of our continuous exploration for human beings in tens of thousands of years of development.

There are no wonders in the universe;

Once upon a time, the ancients, who lacked various scientific detection tools, were using the perspective of mythology to understand the universe; Later, modern science came into being, and in the 21st century, we look at the universe from a scientific perspective.

How big is the observable universe? It's about 93 billion light-years in diameter. For humanity, this is, of course, an indisputably astronomical figure.

After all, we haven't even flown out of the solar system, which is only about a light-year in diameter. Compared to the vast universe, it is a drop in the ocean.

Of course, there are also many people who wonder what magnificent and fantastic scenes outside the universe cannot be explored. Some scholars believe that beyond the universe, there is nothingness, no time, and no space; Mr. Stephen Hawking, the great physicist of this century, is a staunch supporter of this view.

Hawking also gave this "nothingness" a scientific name, called "Hawking Chaos". There is no time and space, chaos; It sounds somewhat similar to the Buddhist "nirvana". Of course, there are also some fans of superstring theory, who believe that there are countless universes beyond the universe.

For example, Wayne, a professor in the Department of Astronomy at Columbia University in the United States. In his speech in 2017, he pointed out that the complete universe has 11 dimensions, and the world we live in is only a three-dimensional structure.

In the three-dimensional space, there are two universes, and beyond the boundaries of the existing universe, there is an "anti-universe" that is very different from our timeline; If we can travel through the wormhole to the high-dimensional space, we will see endless "parallel universes".

And in these "high-dimensional spaces", there are those extraterrestrial super civilizations that live.

The universe has no boundaries, and the complex universe is constantly expanding.

The shape of the universe is still unknown, and human beings are boldly imagining. Some people say that the universe is actually a small cell of such a creature similar to a human being, while others say that the universe is a program or a small original made by a computer creature with higher intelligence than humans.

There are also speculations that the universe is actually an electron, that the universe is something much smaller than an electron, that the universe does not exist at all, or that the universe is intangible.

There are also speculations that our universe lives in a large space called "hyperspace". In hyperspace, there are many universes, and the energy of hyperspace is conserved and very huge. Whenever the energy of one universe rises, the energy of his neighboring universe falls.

In every place in the universe, the energy is different, there is positive energy, there is dark energy, and there is no energy.

At present, the more popular is the big ** theory.

According to the big ** theory, the history of the universe can be represented as a closed surface body with an open right end, as shown in the figure on the right. At the center of the left is the singularity, which extends 13.7 billion light-years to the right. From left to right:

Singularity, 400,000 years of initial expansion, nearly 400 million years of dark periods, emergence of stars, galaxies and planetary developments, accelerated expansion of dark matter and dark energy.

What is it like outside the universe can only be relied on speculation and imagination. Human knowledge can only be confined to the universe.

Because nothing in the universe can escape.

DAO universe, so I can't understand what's going on outside the universe.

The universe is once great.

And still is.

** Said to form some of the matter that formed the planet.

Some formed galaxies.

Some evolved into stars.

Some planets have thrived with life.

The universe has no boundaries.

Because it's spreading.

The universe is just a process.

An act. What's happening.

Arguably. It was a great one.

Because in a moment.

She created the earth. Created human beings.

Although this ** is an instant.

But measure this moment in human time.

Probably hundreds of millions of years.

At least until now, in 2008, it shows no signs of stopping.

I don't think the galaxy will stop without him.

Because if you use Newton's brother's laws to demonstrate.

An object can have two conditions without any external force.

One is stillness. One is to do a uniform linear motion forever.

I think the universe belongs to the latter species.

If the distance of ** is measured in one unit.

That is"Light years"

There are boundaries. Originated from a large **. At present, the mainstream scientific community around the world agrees with this theory. It's not because scientists have preferences or are on the same page. Rather, the phenomena observed so far are consistent with this theory.

Some people in Chinese say that Pangu opens the world and yin and yang are divided into two poles.