How big is the universe and can it be measured by data?

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.

Probably not, the universe is constantly changing, and now it is recognized that it is constantly expanding and expanding.

We humans probably can't measure it with data, and even if we do, we can't be accurate, because the universe is always expanding.

Theoretically, the universe has limits and cannot be measured.

The universe is constantly expanding, and there is no way to know.

Immeasurable, boundless.

No, no one knows how big the universe is.

Existing technology does not support measurement.

We don't know how big the universe is, and with current science and technology, no one can measure the specific size of the universe for the time being, and no one knows how to measure itScientists also have different opinions on the specific shape and size of the universe, the reason why scientists can not give accurate measurements, this is because the universe will expand infinitely, it will expand at any situation and speed, we don't know how big the universe is, and we don't know how big it is, and we don't know that ** is the end of the universe, but scientists have not given up the study of the universe, I believe that over time, human beings can always find a suitable measurement method.

The earth is just one of the very small planets in the universe, there are countless such planets in the universe, I believe that many people are full of curiosity about the universe, and they also want to know how big the universe is, whether we can measure the size of the universe, and how should we measure it? These questions are the results of what we want to know, and it is also a question that scientists have been studying, for us the universe is infinite, it is full of all kinds of mysteries, and there are many secrets worth exploring and discovering, how big the universe is is not yet conclusive, because the universe seems to have been in a mode of expansion, and there is no accurate way to measure it for the time being.

Some people say that the universe is infinite, and some people say that the universe also has a boundary, as for the facts, it remains to be verified, some astronomers have speculated through Hubble's law that the current age of the universe should be 13.8 billion years, according to the speed of the expansion of the universe, scientists speculate that the diameter of the universe can reach 93 billion light years, which is absolutely amazing.

Since the universe is constantly expanding, we don't know how big the universe really is, to some extent, the universe is infinite for us, and we also believe that one day we will be able to obtain a way to measure the universe, and the mystery of the universe is still waiting for us to unveil.

The diameter of the universe has been measured to be about 93 billion light-years. Humans speculated through Hubble's Law.

The entire extent of the universe that we are able to observe, the so-called "observable universe", is about 93 billion light-years in diameter. We can send radio waves directly to the surface of planets close and receive reflected signals, such as Venus and Mars, and measure the time it takes for the signals to travel back and forth. This will give a very precise distance value.

In fact, there is only an approximate number of how big the universe is, and there is no accurate value, and human beings measure it by flying in flying machines.

The observable diameter of the universe is about 93 billion light-years. Another surprising fact about this universe is that we don't see the components that make up most of it.

Dark matter is a mysterious existence that scientists believe is found all over the universe, but we can't see or touch it.

How big the entire universe is is still unknown to mankind.

Scientists believe that the radius of the universe may have exceeded 11 trillion light years, although the universe has only been 13.8 billion years old since its birth, but in fact, the "growth rate" of the universe, that is, the expansion rate of the universe has long exceeded the speed of light, which is also the fundamental reason why it is difficult for people to find the boundaries of the universe.

And if we leave aside the entire universe, just the solar system in which humans live, the entire star system is more than 120 kilometers in diameter, but this is not the end.

Because there is an asteroid belt called the Oort cloud on the outer side of Pluto at the edge of the solar system, if this asteroid belt is also included in the solar system, then the radius of the entire solar system would need to increase by 8 billion to 10 billion kilometers.

Surprisingly, the Solar System is only a small part of the Milky Way. Through computer simulations, scientists have found that if the Milky Way is seen as a feather, then the solar system is located at the tail end of this "feather".

Even so, stars the size of the Sun may have 100 billion to 400 billion stars in the Milky Way, and the size of the entire Milky Way is more than 130,000 light-years, its mass is about 210 billion times that of the Sun, and the distance from the Solar System to the galactic center of the Milky Way is about 100 million light-years.

The universe has been expanding since its inception, and scientists can only measure the universe within 93 billion light-years of the universe with all their might, and this distance is also the boundary of the cosmic boundary that light can reach.

Therefore, people call the universe of 93 billion light-years "observable universe", but beyond the observable universe, how big the universe is and how many stars it has is still unknown to mankind.

Theoretically, it is infinity, but in the end it is either a great freeze (expanding all the time and causing too much dispersion of energy), or a large tear (destruction due to instability), or a large collapse (after reaching a critical point**) or a phase transition (a qualitative change caused by some unqualified factor that will make everything disappear).

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.

The observable universe generally refers to the Hubble volume, which is the farthest distance that humans can currently observe. The true radius of the universe** is 98 billion light-years.

The observable universe refers to the extent of the universe that humans have observed so far. And the real universe is infinite.

The observable universe refers to the diameter of the universe currently observed by humans, and the current observed radius of the universe is about 46.5 billion light-years, with a diameter of 93 billion light-years. Since the universe is expanding faster than the speed of light, it is still an unsolved mystery that we cannot know how big the universe really is if we only observe the universe from Earth.

When people look up at the starry sky, they may feel calm and calm, and the experience may be clear (or meaningless). However, for those with boundless curiosity, stargazing can bring endless questions and mysteries. What will be on the other side of the horizon?

What is dark matter and what does it do? How big is the universe?

How exactly do scientists determine the size of the universe? The last question (at least one of the three) is okay, even if the answer isn't that easy to understand. Let's make this question as simple as possible without going into too much astrophysics:

How do scientists know how big the universe is? Simple: Using measurement tools at different viewing distances (trigonometric parallax, cosmic standard candle, supernova brightness, galaxy redshift, cosmic microwave background) you can create a cosmic distance ladder to accurately measure the size of distant galaxies and universes.

How is distance measured in space? Before we know that the maximum distance of the universe is measured in billions of light-years, we need to start at the first step of the cosmic distance ladder. Start with close proximity – We can use the basic trigonometric functions we learned in high school (which we quickly forget) to try to measure the distance to the nearest universe, such as within our solar system, or within our neighbors in the Milky Way (less than 100 light-years).

Basically, as long as you measure the position of a star in the sky at a certain point in the year and then measure its position again six months later, you can get the position of a closer object in the sky relative to a farther star.

Once the cosmic standard candle --- is beyond the effective measurement range of the trigonometric parallax method, astronomers use stars known as Cepheid variables, which are common and bright. These stars were first discovered in 1794, and they tend to pulsate periodically, brightening and fainting regularly. What's even more interesting is that the longer Cepheids beat, the brighter it becomes; The shorter the pulse, the darker the light.

I know that because astronomers have found the edge close to the universe, about 10 billion light-years away, astronomers will use tools or means to calculate, or judge by the background radiation and spacing generated by matter after encountering cosmic microwaves, which will be affected by absolute interval.

The universe is immeasurable, its size is infinite, until now there is no accepted answer to the size of the universe, that is, how big you see it, but American scientists believe that the diameter is at least 78 billion light years.

You know, it's the use of computers, a lot of telescopes, and some other tools to calculate, the universe is very big.