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Whenever people look up and see the sky, the sky is so endless. For thousands of years, humans have been thinking: What is bigger than the sky?
The ancients came up with the answer: it is the universe. It is so vast, but unfortunately, we have not yet made it clear whether the universe has boundaries?
Cosmic Boundary
Under different time periods, people's division of the universe is different.
More than three thousand years ago, people thought that the sky was round and the place was round. This theory shows that the universe has boundaries, but with the birth of astronomical telescope , people used this device to observe outer space and gradually discovered the vastness of the universe.
also started from this time that people discovered the vastness of the universe and carried out research on other galaxies.
Even when scientists can observe the universe's range of more than 90 billion light years, there is still no sign of the edge of the universe.
Therefore, for a period of time, people believed that the universe had no boundaries. With the development of information transmission capabilities, this theory has also become popular among more people. What follows are all kinds of newspapers and magazines, and they all show that the universe is boundless.
However, not long after, another group of scientists put forward different opinions. They say it's like people standing on the earth, they think the earth is boundless.
When people stand in the universe and look back at the earth, the earth also has size and boundaries. So they believe that it is only because humans’ current technological level cannot reach outside the universe, so they cannot observe the boundaries of the universe.
and they also have their own set of their own theories. Once scientists firmly believe in the statement of Big Bang .
Their starting point was to verify that there was chaos before the Big Bang. So from this perspective, the time of the universe is limited. At the same time, according to current scientific discoveries, for now, the universe is also expanding outward. According to this logic, the universe has boundaries.
Scientists also used light years as to calculate the unit , and calculated that the Big Bang was 13.8 billion years ago.
later, based on these 13.8 billion light years plus the expansion coefficient of the universe, plus various data, it was inferred that the true boundary of the universe should be 120 billion light years away.
Three forms of
Of course, this statement has not only appeared recently. In fact, in the last century, Einstein proposed this theory in . He said that the universe has edges and lines, and even assumed three states of the universe.
The first type is that the universe is actually flat.
Although there are endless matter and various energy in this universe, its bending ability is limited. It's like our highway, some are high and some are low. But from its large area, it is still equivalent to flat, so we came up with the assumption that the universe is flat.
The second type is to say that it is a surface with a saddle-like shape. Of course, this statement is indeed difficult to compare with the current technological level.
Because it's like a person standing far away, you also think he is parallel to you. But everyone also knows that the earth is actually an elliptical form, so its position is not flat with the position of the human individual.
Therefore, just like before people walk out of the earth, they cannot be sure that the earth is a surface, nor can they be sure that the universe is a surface.
The third assumption is that the universe is like the shape of a basketball. is also the most studied direction in the scientific community at present. This assumption refers to: the universe is a large energy ball.
However, due to this combination of energy and matter, the space is distorted, and then an object on a super sphere is formed.
As long as we keep walking in the same direction, we will definitely be able to reach the starting point. Andrew Niedel, an astronomer at the Edinburgh school, once said: It is just because there is nothing faster than light now that humans have not discovered the boundaries of the universe.
If humans discover or invent a faster transport tool than the speed of light, then humans will have the potential to find the boundaries of the universe.
But from the perspective of materialism, no person or institution can now accurately tell whether the universe has boundaries or no boundaries.
Of course, no matter what, people's exploration of the universe is still at the initial stage. Just like the ancients looked at the earth, they believed that the universe was boundless.
But is that really the case? If the universe has boundaries, what kind of scenery is outside the universe?
Unlimited guess
In fact, this idea has existed many years ago, and some scientists have even assumed how it exists.
The first statement is that there is more than one universe, and each universe is like an air bubble, they are all fragile.
As long as the two universes collide, the universe will break. However, the universe is broken at the boundary and has little impact on the air inside, so people have no feelings about it.
even said that the universe continues to expand because the large bubbles absorb the energy of small bubbles, so they can continue to grow.
The second type is that it believes that each object has an advanced system.
is like countless stars like the earth, which forms Milky Way , and then countless galaxies like the Milky Way form a vast universe.
and there are countless objects similar to the universe, forming a larger unit of measurement than the universe. The universe and other spaces similar to the universe, just like the earth and other stars, have a larger space span. The third statement of
is also the most important research direction for human beings, which is the change of dimensions. As of now, space and time are two-dimensional composed of countless one-dimensional, and one three-dimensional consisting of countless two-dimensional.
The space we are currently in is in three-dimensional space, but the three-dimensional space we are in is still a space composed of countless two-dimensional space. According to this logic, there is still four-dimensional space behind it.
, in other words, does the four-dimensional space contain countless universes?
But no matter from which perspective, the universe has boundaries or no boundaries, humans cannot draw a definite answer at present.
But with the development of technology, our level of exploration will change with each passing day. At that time, we will also believe that with the advancement of technology, we will sooner or later get the answer we want.
Even in the future, we can look back and see how far is the difference between people’s views on the earth 100 years ago and what is our views on the earth now 100 years later?
Maybe it doesn’t take long for us to truly understand the universe.
Maybe next year or in ten years, we will be able to see the true appearance of the universe as if we know the earth.
