How big is the universe? What is Observable Extrauniverse?

The entire universe is much larger than the current known range 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.

At present, scientists have not calculated how big the universe is, and the currently observable universe is about 93 billion light-years in diameter, and the universe is too large to calculate, because the expansion rate of the universe is greater than the speed of light, which cannot be measured. Outside the universe is nothingness, with no protons and quanta, and no light.

Infinity. Because the universe is very large, so big that it is boundless, and it is infinite, there are many planets and vacuums outside the observable universe.

The universe is unimaginable to us, and what we can explore now is less than the universe, and the diameter of the universe that humans can observe is 96 billion light-years.

The universe is very large, vast and infinite, we may also belong to aliens in the eyes of other planetary creatures, the universe is vast and infinite, and many things are waiting to be explored.

The observable universe is now estimated to have a radius of 46.5 billion light-years and a diameter of 93 billion light-years.

The observable universe is a spherical space centered on the observer, so small that the observer can observe objects within this range, that is, the light emitted by the objects has enough time to reach the observer. As of 2013, the most accurate estimate of the age of the universe is 100 million years. However, due to the expansion of the universe, the radius of the observable universe is not a fixed 13.8 billion light-years.

The ancient celestial bodies currently observed by humans are far from their original locations. The observable universe is now estimated to have a radius of 46.5 billion light-years and a diameter of 93 billion light-years. If the entire observable universe were compressed into neutron stars, the volume of the "superneutron star" would reach 340 billion trillion trillion cubic centimeters.

This may seem like a big number, but in fact, it's just a sphere with a radius of about 20 billion kilometers. Compared to the solar system, the radius of the generalized solar system is about 1 light-year, and the distance of 1 light-year is about 9,460.5 billion kilometers. That is, the "superneutron star" compressed by the entire observable universe is much smaller than our solar system.

The concept of an "observable universe" arises in large part because the universe can expand faster than the speed of light with the Earth as a reference system, and the universe has a starting point. To date, the universe is 13.8 billion years old, so we can see a much smaller scale than the universe itself.

How big the universe is, according to the current level of science and technology, there is no specific value that can be accurate, Einstein once said that the universe should be infinitely large. And the universe is expanding all the time, and it's getting faster and faster. Previously, some astronomers speculated that the current age of the universe should be 13.8 billion years through Hubble's law, and if the expansion rate and age are combined**, the observable diameter of the universe is about 93 billion light years.

The origin of the universe has always been quite controversial, and the most scientific theory is that because the universe is large, there are substances such as black holes in the heart, and the universe is formed after evolution. In the past, human beings always wanted to explore the vast starry sky, with the development of science and technology, now human beings have successfully landed in outer space, that is, because of this step, human beings found that the earth we are in is very small, only a part of the solar system, and the solar system is a small part of the Milky Way. Even if we look up at the stars in the sky, they may be larger than the sun.

And all of this is in the vast universe, so it's hard for us to imagine how big the universe is. <>

Scientists' estimation of the diameter of the universe of 93 billion light-years is only an estimate within the detectable range, in this mysterious universe, none of us know whether there is a boundary, and it can even be said that the end of the universe measured by scientists may have more mysterious regions beyond the measurement. The way for human beings to observe the size of the universe is mainly to use the concept of cosmic redshift, by detecting the emitted electromagnetic waves, to observe the spectral redshift, and roughly estimate the value. <>

And in the future, the universe will continue to expand, and in the process, more things in the world may be derived, from nothing to something, from small to large. As for where this boundary is, human beings can't touch it. But it is this mystery that attracts human beings to further explore the universe and promotes the progress of civilization.

The universe is about 93 billion light-years long; Human beings mainly observe the size of the universe through some special observation methods, such as trigonometric parallax method and distance method.

To estimate the size of the universe, we must first know how far away the star is from us. Once this distance is known, we can speculate on the size of the entire observable universe before we discover new and farther stars.

There are several ways to determine the distance between stars:

1) Trigonometric parallax method.

2) Spectroscopic parallax method.

3) Cepheid circumferential light relational ranging method.

4) Spectral line redshift ranging method.

How big is the universe now? Human science has not yet been able to detect it, and humans can observe the universe through some sophisticated astronomical telescopes and other equipment.

The diameter of the observable universe is about 93 billion light-years. The observable universe is a spherical space centered on the observer, small enough for the observer to observe objects within that range, meaning that the light emitted by the object has enough time to reach the observer.

After the universe was large**, some parts of the universe may have been too far away from the Earth to emit light that has not reached the Earth until now, so this part of the universe may now be outside the observable universe. In the future, light from distant galaxies will have a longer time to travel through space, so a portion of the universe that we can't observe now will be observed in the future.

Determination of the volume size of the universe.

The diameter of the universe is generally thought to be 29 billion parsecs, or about 93 billion light-years, but assuming the universe is smooth, then this means that the volume of the universe is 10 cubic meters, which is about the size of cubic light-years.

In cosmological time, these data are the distance of the present, not the distance of the moment when the light is emitted. For example, the decoupling photons emitted by the cosmic microwave background radiation were emitted 380,000 years after the big **, about 13.7 billion years ago, and these radiations were emitted by some of the material that later formed most of the galaxies, and these galaxies are now 46 billion light-years away.

The observable universe is 4x1080m. The Hubble volume (also known as the observable universe) is a spherical space centered on the observer, small enough for the observer to observe an object within that range, meaning that the light emitted by the object has enough time to reach the observer. The Hubble volume radius is about 46 billion light-years.

Or simply put, the size of the universe, also known as the Hubble volume. <

The observable universe is 4x1080m. The Hubble volume (also known as the observable universe) is a spherical space centered on the observer, small enough for the observer to observe an object within that range, meaning that the light emitted by the object has enough time to reach the observer. The Hubble volume radius is about 46 billion light-years.

Or simply put, the size of the universe, also known as the Hubble volume.