How many kilometers of the radius of the universe have been observed by humans?

13 billion light years. But I think that this universe is as big as our mind, and as small as our mind is, this universe is as small. This universe is made according to our ideas, so how big our ideas are, this universe is as big as we are.

More appropriately, the universe exists in our minds.

The farthest celestial body that humans can now see is 13.7 billion light-years away from Earth, and we believe that the universe was born 13.7 billion years ago. But because the universe expands faster than the speed of light, the scale of the universe is inferred to be more than 13.7 billion light-years.

The farthest galaxy that has been observed is 13 billion light-years, one light-year is equal to a kilometer, and one kilometer is equal to 10 3 meters. The most soudan finally multiplied these numbers by the fading world.

Hope it helps.

With the continuous development and improvement of people's means of understanding and observing the world, people's observation of the universe has been expanding, in ancient times, people only looked at the world with the naked eye, the universe is heaven and earth, and later appeared Ptolemy as the representative of the geocentric theory, that the earth scum stool is the center of the universe, and then Copernicus represented the heliocentric theory, overthrew the dominant geocentric theory, so that people's understanding of the universe expanded to the solar system.

Later, people used telescopes to expand the scope of research of the universe to the Milky Way, and in the 20th century, with the development of photography and spectroscopy radio telescopes, which greatly expanded people's horizons, people's understanding of the universe, including the vast desert galaxies.

So far, China's independent research and development of the radio telescope, known as the super eye of the sky, is the world's most sensitive and advanced telescope, it can receive electromagnetic signals from the universe 13.7 billion years ago, so that the diameter of the detection of the universe reaches 93 billion light years, which is the largest range of the universe that we can detect at present.

The length of the universe is measured in light years, and the latest research suggests that the diameter of the universe can be 93 billion light years, or even larger.

The broad definition of the universe is the general term for all things, the unity of time and space. The narrow definition of the universe is space and matter beyond the Earth's atmosphere. The definition of "cosmos" in "cosmos" is the definition of "cosmos" in the narrow sense, and cosmonautics means to sail in space beyond the atmosphere.

Some of the objects of the universe observed by humans are roughly made up of ordinary matter (the matter that makes up stars, planets, gases, and dust) or "baryons", dark matter, and dark energy. Baryonic matter makes up the "spider webs" of intergalaxies.

10 28cm, which translates to 10 23km, is calculated using the law of gravitation and the formula for the volume of a sphere.

Only half of space is known now.

Actually use kilometers to describe the universe, I advise you to read more books!

Who knows how big the universe is, and what is outside the universe.

10 to the 23rd power of kilometers (if the observed radius of the universe is 15 billion light-years).

The sheer size of the universe is incredible.

The farthest Voyager 1 spacecraft was launched on September 5, 1977, and it has been four years since it reached the edge of the solar system. In other words, the Voyager 1 spacecraft flew for 4 years and only about a light-year (the Sun is 8 minutes and 20 seconds away from our Earth). If Voyager 1 were to fly 15 billion light-years into the universe, it would be impossible (it would take billions of years).

Even a space probe with a speed higher than 1000 Voyager 1000 is impossible. Imagine that the Milky Way spans 100,000 light-years and there are 100,000 galaxies in the universe. If you think of the universe as a sphere with a radius of 1 kilometer, the Milky Way is the size of a pill, and the Earth can only be seen with a microscope.

1.1 light year = 946080000000000 km, and the radius of the universe is 137 light years.

That is, 946080000000000 137 = 129612960000000000 km.

2.The universe is expanding at an accelerated rate.

So far, the radius of the universe that can be observed by mankind is between 13,515 billion light years, and one light year is equal to about 10 trillion kilometers, which means that the radius distance that humans can observe is the area of the total galaxy may not exceed his range. Total galaxies can also be compared to the entire universe, whose existence and volume are not fully defined, and may expand to 17 billion next year.