Who knows how big this universe is? How big the universe is, who knows

The current radius of the universe is about 46.5 billion light-years, with a diameter of 93 billion light-years. However, 93 billion light-years is only the diameter of the universe that we can observe, and since the universe is expanding faster than the speed of light, we cannot know how big the universe really is if we only observe the universe from Earth, which is still an unsolved mystery.

How big is the universe? Star Awareness Project

How big is the universe – microwave mismatch confirms that our universe is a megaburger (www.chinascience.com).

News "Nature" ** May 18 news, how big is the universe? This is an age-old question in science, and the answer should be that the size of the universe ranges from an area slightly larger than what we see to infinity. Until now, cosmologists have obtained this uncertain large numerical block by professionally detecting the afterglow in the microwave radiation after the large **.

Cosmologists have calculated that the universe cannot be smaller than a 78 billion light-year hamburger. This conclusion rejects the earlier understanding that the universe should be an enveloping, relatively small shape. For example, Raminette et al. published an article in Nature volume 425, pages 593-595, arguing that the shape of the universe should be like a football, which means that the diameter of the universe is about 60 billion light-years.

The latest article by physicist Neil Cornish and others at Montana State University in the United States is about to be published in the Physical Review Newsletter that the small universe hypothesis gives the universe too little space to remain. If the universe is relatively small, it doesn't have to be so obvious, because it doesn't have to have an edge. Space may be enveloped in itself, like a character in a video game that can disappear on one side of the screen and then reappear on the other side of the screen.

If this is the state of the universe, then light from distant objects should be able to travel along more than one path to where we are, just as a man walking from the North Pole to the South Pole can travel along many roads on the curved surface of our Earth. Therefore, we should be able to see the light emitted from the same object, arriving along obviously different propagation paths. In principle, it is not absurd to see the light coming from the Earth that surrounds the universe, so we should be able to see the Earth in the same way that life formed 4 billion years ago saw the Earth.

To verify that light is wrapped in this form, Kaunish et al. analyzed data from NASA's Wilkinson Microwave Anisotropy Probe, which captures microwave radiation just 379,000 years after the start of the universe. If light from the same object arrives from different directions, Kaunish et al. calculate the ring shape that should be produced by the hot and cold spots in the radiation. However, Kaunish et al. did not find any statistically significant matching rings, so they concluded that the diameter of the universe must be larger than 78 billion light-years, that is, it must be 28 billion light-years larger than the distance that can be seen through a telescope.

Kaunish is convinced that further observations using the Wilkinson Microwave Anisotropy Probe will raise the limit of the size of the universe to about 90 billion light-years. The Wilkinson microwave anisotropy detector is located 1.5 million kilometers from Earth and is able to detect temperature differences of 1/20 million in microwave background radiation.

The size of the entire universe may be infinite, but the human observable range is 93 billion light-years.

The universe is divided into the Milky Way, the Solar System, and countless galaxies. With hundreds of billions of stars and a large number of nebulae, as well as interstellar gas dust, the Milky Way is the galaxy in which the solar system is located. The Milky Way is in the shape of a silver-gray ring.

The solar system also includes planets, moons and small celestial bodies, and the sun is the only star in the solar system, that is, the celestial body that produces energy by its own heating reaction, which is located in the center of the solar system. From this point of view, the exact size of the universe is not known at this time.

1: While the size of the entire universe is unknown, the size of the observable universe can be measured, with an estimated diameter of 93 billion light-years. In the various multiverse clavian theories, a universe is one of the components of a larger multiverse, and each universe itself encompasses all of its space and time and its matter.

2: With the gradual improvement of the level of sky survey observation technology, human beings continue to try to draw the whole picture of the entire universe. On January 14, 2021, the National Astronomical Observatories' Beijing-Arizona Sky Survey (BASS) team and the Dark Energy Light Destruction Hall Survey (DESI) team jointly released the latest huge 2D universe map.

How big is the universe? Star Awareness Project

How big is the universe? Star Awareness Project

According to the latest observations, the farthest galaxy that has been observed from us is 13.7 billion light-years. That is, if a beam of light is emitted from the galaxy at a speed of 300,000 kilometers per second, it will take 13.7 billion years to reach Earth. This distance of 13.7 billion light-years is the extent of the universe as we know it today.

To be clear, the extent of the universe as we know it today, or size, is a spherical space centered on the Earth with a radius of 13.7 billion light-years. Of course, the Earth is not really the center of the universe, and the universe is not necessarily a sphere, but we can only understand this extent due to our current observation capabilities.

Therefore, the universe has no boundaries, and our observation ability determines how far we can see, and our observation ability is developing, and the scope of observation is also increasing. However, according to the theory of the universe, the universe is still expanding.

The vast universe is boundless, and its depth is unimaginable, In April 1999, an astronomical research team at the State University of New York in the United States used"Hubble"The immense power of space telescopes. After more than 2 years of careful observation and scientific processing with electronic computers, more than 400 images of celestial objects overlapping in this direction were eliminated"Please"One of the oldest galaxies has emerged, and from the fact that it regresses and expands at the speed of light, it should be at the edge of the universe at 13.7 billion light-years!

The distance of 13.7 billion light-years is incomparable, and even the fastest light would have to travel 13.7 billion years to reach it. It can be seen that this farthest galaxy is also a celestial body shortly after the universe, and it is extremely precious and ancient"Cosmic fossils"Because in exploring the origin and evolution of the universe, the early history of the universe will be of immeasurable significance.

The universe is not infinite, or rather, the narrow universe we live in is not infinite. Its boundaries are still debated in what form they exist, but the idea that "our universe" is not infinite has been largely agreed.

Now there is an argument that space-time is distorted at the edge of the universe, meaning that you can get infinitely close to it, but you can't reach it.

As for the universe in a broad sense, that is, whether the universe outside "our universe" is infinite, this is not clear, just as it is impossible to talk to Xia Worm, the current human science and technology have no understanding of this, and the current research has not yet broken through the scope of our universe.

The universe is infinite, but it is bounded. Hawking's understanding of the universe is like a basketball, you can't find a beginning and an end on the surface, but it is bounded. It's like a lot of astronomy books are covered in it, if you look at Stephen.

Or it can be obtained from the big ** theory that our universe is still expanding, and galaxies are still regressing from each other, that is, the universe we know is still expanding, extending, and expanding, but it has not yet reached its end.

From a philosophical point of view, both finite and infinite are relative concepts.

As early as 500 years ago, that is, before Magellan circumnavigated the earth, many people believed that the earth was infinitely large, and only a few philosophers and astronomers believed that the size of the earth was limited, but they did not know how big it was.

With the development of science and technology and the development of population, people have gradually discovered that the earth is finite and even small for human beings. Humans began to want to colonize the Moon, to Mars, or to other planets in the solar system.

As human products moved to Pluto, it was discovered that the Earth was almost the only habitable planet in the solar system, and human eyes began to look at other corners of the galaxy.

So, just from the perspective of the earth and the solar system, you can illustrate this problem, finite and infinite are only relative, when you can understand the size and margin of a thing, this thing is finite, when you can't understand it, this thing is infinite. As for the universe, cutting-edge physologists have proposed many models, some of which are infinite and some are finite, but they are all based on theories and assumptions, and none of them have been confirmed. However, from the perspective of modern universal philosophy, the most admired is the doctrine of finite boundlessness.

A model can be used to illustrate the finite and boundless universe: if a two-dimensional creature is inhabited on the surface of a sphere, this creature cannot understand the concept of height, so it can only move in two dimensions on the surface of the sphere. The surface area of this sphere is finite for this creature, but there is no margin, and no matter which direction it walks, it will return to the starting point.

To expand this model to one dimension, it is the universe we live in. We are a three-dimensional being, and the universe is closed and finite in three-dimensional space, and in more dimensions, we cannot comprehend. Just like humans 500 years ago, they couldn't understand how big the earth was.

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All I can say to you is that, at present and for a long time to come, the universe is still an infinite concept. We don't even know the Milky Way yet. There are several places in science that urgently need breakthroughs in the 21st century, one is the problem of resources, especially energy, two is the transportation within the earth, third, the further development of medicine, many diseases can be prevented at least, and fourth, it is the further exploration of the universe.

Fourth, the most difficult, I personally think that unless aliens give us the technology to make flying saucers, it will be difficult to break through the speed of light in the future.

Now science can only say that the universe is infinitely large, and no one knows how big. After all, human science is underdeveloped.

The universe has no boundaries, and the only thing that can define it is time, thank you!