Will quasars, which are only a few hundred thousand light years away from our Earth, destroy us? 10

I think quasars are only a few hundred thousand light-years away from our Earth, and they shouldn't destroy us.

Because the earth has existed for so many years, it has not been said that there is a little bit of enthusiasm to destroy, so we should not be able to destroy it at this time, and the existence of every thing has its certain truth.

No, it's that far away, it can't be.

First of all, you have to know"Light years"This unit is a unit of distance, and the light emitted by a star at a distance of x light years, after x years of light propagation, is detected as the state of the planet when it emits this light, that is, the state of x years ago, and does not represent its current state.

As long as the ability to emit light is strong, distance is not an issue. Moreover, our astrophotography can also subjectively increase the brightness of celestial bodies through a long period of time**, and some celestial objects that are too far away and too faint to be seen can be seen.

It is because the light (or other electromagnetic waves and rays) emitted by stars hundreds of light-years or even hundreds of millions of light-years away has traveled through the universe for hundreds of millions of years, reached the earth, and was received by scientists. What we see is what these stars looked like hundreds of millions of years ago, and it is impossible to know what they look like now.

So far, we've seen galaxies as far as 10 billion light-years away, but the observable universe we can see is still very small in normal activity! We all know that one of the greatest discoveries of human civilization is "modern science"! Before the birth of science, mankind was still ignorant and confused;

After the birth of modern science, we have the tools to explore the universe and transform nature, and we have successfully made human civilization and the earth different in the vast sea of stars! Today, with the rapid development of high technology, the regulations for exploring the universe are also about to come out!

Of course, "a journey of a thousand miles begins with a single step". If we plan to fly beyond the solar system and out of the Milky Way in the future, we must explore most of the space in the universe! Unfortunately, the current measurement tools of human beings do not allow us to meet this need!

To date, humans have discovered the farthest distance celestial bodies;

In the nineties of the last century, Alfred, a professor at the Department of Astronomy at Columbia University in the United States, saw a large nebula about 98 light-years beyond the Milky Way through the large combined Hubble telescope! Of course, this is just a "chance"! Whether this nebula exists or not is also very controversial in today's scientific community!

To be honest, our current cutting-edge technology can at most allow us to see the universe within hundreds of thousands of light years, and it has not completely departed from the Milky Way! That's right, the two "black hole fusion" images that NASA saw in 2018 were finally captured after two years of hard work!

And those two black holes are only 320,000 light-years away from the Earth! In other words, the "observable universe" is just a drop in the ocean compared to the real universe! Because, the diameter of the universe is 93 billion light years!

Some people say that if human beings want to go further, they must study the "field theory" of the unified four major force systems, otherwise, even if they develop for a few more decades, they can only "stand still"!

Less than a light year, because a light year is too far away for humans to reach.

It shouldn't be probing, it's analytical! So far, as far as I know, after the Moon and Mars

Because what we're seeing is what happened hundreds of millions of years ago, and the light has run to Earth, just like the sun we see was the sun eight minutes ago.

The observable universe is 93 billion light-years. The universe is filled with all kinds of celestial bodies. The number of objects within 40 million light-years of the Earth would be very large.

Recently, NASA photographed a galaxy 44 million light-years away from Earth, NGC5866, which is about 60,000 light-years in diameter.

It should be possible, after all, human beings do not have a special understanding of the universe now, and the space of the universe is very large, and it is very likely that there will be such a large planet.

Is the nebula a special celestial body? At the moment, scientists do not have a clear answer. At present, the concept of stars is mainly focused on planets, stars, neutron stars and other celestial bodies, but with the continuous progress of human science and technology and the continuous improvement of the understanding of the universe, it is very likely that our definition of stars will be updated and improved in the future, and those super-large cosmic structures may also be divided into the scope of stars.

If a new definition of a star is given, it would not be surprising that the diameter of a star reaches one light year. Of course, there is no clear answer to whether the diameter of a star in the traditional sense can reach one light year. At the end of the day, human beings don't even know much about the universe, and it is possible that there are stars in the depths of the universe that we cannot observe.

Inexistent! If there is a planet with a diameter of one light year, then it will be very dense and will reach the level of interstellar dust. At this point, it's not yet a planet.

I think there are such planets in the universe, after all, the space of the universe is infinite, and there is no way to make a complete measurement of the universe as a whole, so it is very possible that such a planet will appear.

In addition to the earth, there are other planets in this universe, and those planets are much larger than the earth, the size of the universe is enough to hold billions of planets, many planets are far away from the earth, and many of those distant planets are the same as the sun, "can burn themselves and illuminate the darkness", and we can also see them, why can we see thousands of planets on the earth, tens of thousands of light years away? Of course, this is not directly with the naked eye, the distance of the human eye is not enough to reach this far, but with high-tech observation of light from tens of millions of light years away, so as to determine how far away there is such a glowing planet.

A long time ago, I thought that the sun revolved around the earth, but with the spread of civilization, we all know that the earth revolves around the sun, the volume of the sun is far more than a million times larger than the earth, and it is the center of the entire solar system, and in the entire universe, in addition to the solar system, there are many planets, among these galaxies, there are stars that can shine like the sun, and a small part of their light will come to the earth, because there will be cosmic particles and other planets blocking the way, resulting in a sense of distance in the bed of lightWe were able to capture these rays of light and thus learn about the outside of the earth, and in this way we slowly learned some of the secrets of the universe.

For human civilization at this stage, exploring the universe is a good thing, after all, there will be no cosmic catastrophe in a short time, and for us advanced creatures, time is everything, dinosaurs once dominated the earth for hundreds of millions of years, but did not evolve anything, and human beings have only been a few million years now, they can already land on planets other than the earth, and they are still looking for another "earth" for the spread of human civilization in the future, so it is normal to find other planets on the way.

The current social problem is mainly the problem of energy shortage, and the three major resources we live there "oil, coal, and natural gas" have been almost exploited, and we can only embark on interstellar travel to explore the planets beyond the earth, find better resources, and lay the foundation for the future of mankind.

Because light travels at a certain speed in space, it takes thousands of years for the reflected light to reach the earth on planets far away from the earth.

Because of the light, the light emitted by those stars many light years ago, after a long journey through cosmic space, reached the earth, and can only be perceived by our human eyes. I think we will also be able to see the light emitted by those large celestial bodies, some of which do not emit light or are relatively dim, and the human eye will not be able to see them at all, but I believe that in the future, we humans will be able to see those planets even with the naked eye.

Because of the propagation of light, we all know that the propagation of light has a certain speed, and the planets thousands of light-years away let us see because of the irradiation and refraction of light.