Can humans see what s on the ground on a planet 100 light years away?

I ask you: Can humans on Earth, in space outside the Earth's atmosphere (between the Earth and the Moon), see through a telescope what people on a planet 100 light-years away from Earth look like? "

Yes, at least in principle. However, there are also two very difficult problems, the first is that it takes time for information to spread, even if it travels at the fastest speed of light, it still takes a long time to travel in the vast space. For example, if a celestial object is 100 light-years away, we receive information that was sent 100 years ago.

The second is that in order to pay attention to these details, you need to have very high-resolution imaging, which means that you need to build telescopes with very large apertures. Regardless of the process for the time being, if the landlord is interested, he can calculate how much caliber is needed to achieve the required resolution, and my personal irresponsible estimate should be comparable to the size of the solar system.

As for what the landlord said, it should be a wormhole, and it is an interesting reverie to study history through impulse. But for me, the bigger attraction is that if humans can control the generation and positioning of impulses, then we will be able to move beyond the solar system very quickly.

Quasars are by far the most distant objects ever observed, at least 10 billion light-years away from Earth. A quasar is a celestial object with high luminosity and intense radio power that can be observed at extremely long distances. Quasars are much smaller than galaxies, but they release more than a thousand times more energy than galaxies, and their extraordinary brightness allows their light energy to be observed from a distance of 10 billion light-years.

The answer is no.

Like radio signals, signal failure occurs when light travels through space at great distances. As the intensity of light decreases and the light is scattered and diffracted to diffraction increases, the information contained in the light becomes blurred. Eventually, you'll see a cloud of light, but you won't be able to see what's inside, and you can't tell the difference no matter how big the telescope's aperture is.

This idea is good, but it is basically impossible.

Our eyes see not only celestial objects 7.5 billion light-years away from Earth, but also what happened in the depths of the universe 7.5 billion years ago. Because these rays of light traveled in the universe for 7.5 billion years before they came to Earth, they were fortunately caught by our eyes. On Earth, the two most visible celestial bodies are the Moon and the Sun, the former being the closest to the Earth and the latter being the closest star to the Earth, both of which can be seen during the day.

The more distant celestial bodies, because their light has become faint by the time it reaches Earth, only become visible to the naked eye at night.

If you are not limited to the stars, but expand to celestial bodies visible to the naked eye, then the distance you will be able to see will continue to grow. The Andromeda Galaxy M31 is so bright that it can be easily seen with the naked eye in the wild. The distance from it to us is 2.5 million light years.

I've also seen reports that M81 has been seen with the naked eye in the best places, and that this galaxy is about 12 million light-years away from Earth. Of course, it cannot be ruled out that this may be the result of brain supplementation......

In fact, when you see stars with the naked eye, you can't judge the distance, only the brightness and quality of the star. Massive stars are easy to see, such as the Weaver Girl, according to astronomers, 26 light-years away from our earth, the Cowherd Star is only 16 light-years. On the contrary, the Cowherd Star I saw was ten light years away from the Weaver Girl, and those who didn't know thought that the Weaver Star was close to us, so we ordinary people couldn't do anything to know the Lord's question, and we ordinary people could see the farthest star with the naked eye.

This is not exact, because in addition to the factor of distance from the earth, there is also a difference in size. So, when you see the moon with your inner eye, it's actually small, and when you see a tiny, shiny planet, it's actually big, even bigger than the sun. In fact, we can't see that far with the naked eye, what we see is only the light emitted by people a few light years ago, and it reaches our eyes!

It took a few light years for some light to reach our eyes, and maybe that star doesn't exist anymore!

The farthest star visible to the naked eye is Seamount 2, about 7,500 light-years from the Sun. It is a variable star that has undergone drastic changes, and its luminosity fluctuates greatly.

The farthest planet that humans can see with the naked eye will be 10,000 light-years away, and this planet is the star of HD 188209, located in the constellation Cygnus.

The farthest planet is 7.5 billion light-years away from the Earth, which is very far away, and it is not easy for this planet to be discovered by humans.

If the speed of light is equal to the speed of light, then all the stars in the universe that humans see are already the same as those of stars many billions of years ago, so it is unknown whether they have changed.

The farthest planet that the human eye can see is 7.5 billion light-years from Earth, and this planet is GRB 080319b.

Less than a light year, the limit of human vision is less than 30 kilometers, and the speed of light is so fast that it is not necessary to calculate in light years.

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.

The concept of a planet visible to the naked eye is too vague, isn't the moon a planet? It's just a second away from Earth, which is light. This is followed by Venus, which is only 150 light-seconds away from Earth at the time of transit.

Then there is Mars, and at opposition, it is 200 lights and seconds. All in all, the planets in the solar system are visible to the naked eye, and none of them are measured in light years. Stars outside the solar system, the south gate pins touch two, light years away.

The farthest planet from the Earth with the naked eye is 7.5 billion light-years away from the Earth, and there may be even more distant planets that have not yet been discovered, and people will be able to discover more and farther planets in the future.

With 7.5 billion light-years, it can be seen that this distance is very far away, and humans will never be able to explore it, so this number is also very scary.

It is 7.5 billion light-years from Earth. I think it's really majestic, the technology is really great, my country is really strong, and some researchers are constantly studying celestial bodies