Why can t Hubble see aliens?

What a terrible question you have is that the Hubble telescope is used to observe aliens?

Do you think it's the same as you're at home with a telescope and peeking at the girl in the opposite room?

You can't imagine that the universe has a pair of big.

For example, a person's field of vision is about 500 meters, and a 1 cubic meter cube is only 500 miles away, and even if you see it, it's a pinhole, and you can see that there's bacteria on it.

You're going to tell me that you can magnify the telescope five times, so what if I put the cube 2,500 away?

It's a distance of 1:500 times, but if you look at the universe, it's probably 1:100 million times.

The Milky Way is 10 light-years away, and the closest Sagittarius Nebula is 14 light-years.

Light one second 300000000 meters.

The distance traveled by light in a year is about 9460.5 trillion meters, which is called 1 light-year.

Then the nearest one is 14 light-years.

Even if you see it, it's just a nebula the size of a bowl and a sesame seed-sized perseverance, and the planet doesn't glow, it's hard to find, and there's light pollution, and even if you see it, the planet's atmosphere will reflect it, and you can't see anything.

Hubble's resolution is measured in light-years, and it is impossible to tell if it is less than that, how many light-years do you think aliens can reach in height?

Probably saw it, but it wasn't announced.

Hubble is not as good at observing the planets as he imagined, and the details will not be clearer than those of ground-based telescopes, after all, it is a product of the last century, and it is already a little backward now.

The role of astronomical telescopes sent into space.

The mission of astronomical telescopes sent into space is to detect and measure the light emitted by the star Mars system in the distant starry sky. Those lights that are invisible to the naked eye are detected with special combinations.

When the primary mirror of the Hubble Space Telescope is aimed at a luminous planet, the light from the distant planet will be focused on the various instruments of the telescope, and then the collected data will be converted into radio signals, and with the help of communication satellites** to the Earth, the computers on the Earth will then restore the received signals to various images for astronomers to study, thus revealing many secrets of the universe.

Now, the astronauts have corrected the "vision" of the "myopia" Hubble Space Telescope, and the images sent back to the ground are now very clear. Astronomers hail the Hubble Space Telescope as a "magic weapon for observing the sky", believing that with it humans can observe celestial bodies farther away.

The Hubble telescope cannot directly observe the planet.

The most powerful advantage of the Hubble telescope is to see distant luminous objects, stars and nebulae material, which are luminous bodies that propagate energy. Directly observing their nuances, they are still limited by time and space, and they cannot be seen in their true form, and some authors compare them with Mars.

The picture captured by Hubble is a kind of blurry point, which is not at the same level as the picture taken by the Mars rover at close range, and there is a problem that cannot be solved physically, that is, the problem of shortening time and space, so the Hubble telescope cannot directly observe the planet.

All Hubble can do is add the brightness of the stars.

It is impossible to show any details, and even the Webb telescope of meters cannot see the details of the planet after going to the sky, and the small size of the telescope is only one reason, the fundamental problem is that the celestial bodies are too far away.

The Hubble telescope looks at Proxima Centauri light years away like a light source of an apple-sized beam of lead from Beijing to Shanghai, at most it can only see this light source, as for what this light emits, the Hubble telescope cannot see, the Hubble telescope can only see the stars that will emit light and the galaxies composed of a huge number of stars, and the ability to observe the planets that do not emit light is very limited.

Visible light is essentially a kind of electromagnetic wave, and the vast electromagnetic wave band outside the visible light band also hides a lot of information about celestial bodies, so the oak macro alone does not rely on the Hubble telescope, and the radio telescope sometimes plays a greater role than the optical telescope.

There is no way to observe directly, although you can see far away, but the distance between the planet and the earth is also very far, so there is no way to observe directly.

Because this telescope cannot directly observe the planet, it is not a professional astronomical telescope.

Because there will be certain substances in the middle, which will cause certain effects, there is no way to observe better data.

This situation involves the identification of the limit value angles of the optical components. With the human eye, we can see the planet more than 20 trillion light-years away from the earth, but we can't see ants that are only one kilometer away from us, nor can we see exoplanets that are only hundreds of billions of light-years away, let alone whether there are lives on exoplanets.

How far away an astronomical telescope can see is not only related to the spacing of the objects, but also not so much their size. Although some objects are far away, they can be observed by a telescope as long as they are large enough. Although some objects are very close, they are too small to be distinguishable with glasses.

Based on the trigonometric function, the following expression can be obtained: the difference in distance and the specific size of the elements can be used to determine the apparent size of an object. For any optical component, such as an astronomical telescope or a binocular eye, there is a minimum resolution angle.

Once the resolution angle of the observed object falls below this limit, the optics will not be able to distinguish the key points, and the observed object will appear to be only a few pixels. According to the Rayleigh criterion, the limit value discrimination angle of the optical element lies in the specification:

In the above equation, the wavelength of the light at the angle of incidence is indicated. The Hubble Space Telescope is an optical telescope, which is more sensitive to the wavelength of 550 nanometer technology, and the primary mirror specification is meters, so Hubble can distinguish the smallest angle of view as degrees, while the limit value of the human eye is generally 1 arc minute (i.e. 1 60 degrees). Although some distant galaxies are located hundreds of millions of light-years or even tens of billions of light-years away, they can reach tens of thousands of yuan to tens of trillions of light-years in size, so they can distinguish the angle above the limit value of Hubble, and Hubble is completely capable of distinguishing them.

It's just that due to the distance, the light from the long planet has already become very dim when it arrives on Earth, and Hubble has to work on them for a long time to see them.

On the other hand, although exoplanets are not very close to Earth, with the nearest Proxima Centauri b only 100 million light-years away, their apparent diameters are much smaller than Hubble's limit resolution, making them difficult to see in detail. Combining the above two formulas, it is calculated that in order to distinguish Proxima B, which may be the same size as the Earth, the specifications of the telescopes required are about to reach meters, which is much higher than that of Hubble. However, because the apparent diameter of exoplanets is so small, we should not expect to see exoplanets in the same way that we can see large planets in our solar system.

If there were life on an exoplanet, because extraterrestrial life was much smaller than a large planet, it would be impossible to observe it with optical telescopes, and even the giant telescopes in Europe would be helpless. Unless there are the most advanced extraterrestrial civilizations living on these planets, they will also send out electromagnetic waves with sufficient kinetic energy, so that people can use space telescopes to detect the existence of extraterrestrial civilizations.

Because so far we don't have enough evidence to prove the existence of extraterrestrial civilizations. So even though the technology is very advanced, we still can't detect it.

Maybe it's because there really aren't any aliens, so they haven't been observed yet.

Because the Hubble telescope can only passively receive light and electromagnetic waves, rather than directly observe, it is not known which celestial body has aliens.

The reason why you can't use the Hubble telescope to see if there is life on other planets is because what the Hubble telescope can do is only see, not see.

1.The Hubble telescope cannot find aliens and requires a space telescope of several hundred kilometers.

to directly observe the surface of the extraterrestrial. Even if the nearest star is a neighboring star or solar system.

It is also a blurry pixel in the planet, not to mention the surface of the outer planet. Even an imaginary Dyson sphere.

The structure can also only be inferred by calculations. If you let an optical telescope (Hubble is also an optical telescope) to distinguish a one-meter-long object that is a light year away from Earth.

2.Telescope.

The distance at which an object can be seen is not only related to the distance of the object but also to the size of the object. Although some objects are far away, they can be observed through a telescope as long as they are large enough. While some objects are very close, they are too small in size to distinguish telescopes.

Once the resolution angle of the observed object is less than this limit, the optical system will not be able to distinguish the details, and the observed object will appear to be just pixels.

3.Outside of Earth, it is not affected by the Earth's atmosphere.

interference. Scientists can rely on it to observe the universe directly, which is a prerequisite for it to be one of the most important astronomical telescopes for mankind. The Hubble telescope works 24 hours a day. Scientists.

Through it, a lot of information about the depths of the universe is obtained, which further deepens our understanding of the universe. With the help of the Hubble telescope, the scientists have also solved many of the problems that have hindered their research.

4.Essentially, the Hubble telescope is just a Taiwanese optical telescope with an aperture of only meters, limiting its observation range. For celestial bodies in the depths of the universe, even through the long-term ** collection of cosmic celestial body photons, only vague general information is known.

Thus, the Hubble telescope can know what celestial bodies are in the depths of the universe. As for what is on celestial bodies, we don't know, so there's no way to monitor aliens.

I think the main reason is that this kind of telescope can only observe the surface of these planets, and it is difficult to directly call for observation on the ground, it can only observe the existence of these planets, but it is impossible to determine the changes in the internal environment and whether there is life in the hand.

The reason why there is such a state of existence is that for the Hubble telescope, its own resolution is relatively unique, and if it is used to see whether there is closed-bearded life on the earth's cavity macro, its resolution cannot reach the corresponding standard.

Because the Hubble telescope has a particularly low resolution, it can't see other planets at all.

Because of the diffraction effect produced during space observation, the Hubble telescope cannot accurately generate image points when observing Mars, so it cannot be seen clearly when observing Mars.

Because Mars is very far away, and Mars is very difficult to observe, it will not be visible.

Because of the diffraction effect, for a certain object, the telescope can not accurately generate an image, but can only show a patch, and the resolution of the telescope is relatively low.

The Hubble telescope can see that far, but it can be used for each specific celestial object. In fact, there are many people who say that since it is said that the Hubble telescope can observe a long distance, why not use the Hubble telescope to observe other celestial bodies and <>

In fact, there are still people who say or propose to use a detector to observe a more sophisticated comparison, indeed, someone did do this similar comparison, he also took a Hubble telescope and a detector to observe the same celestial body, although the Hubble telescope can be observed, but not as carefully and comprehensively as the detector observes, according to the pertinence, and therefore, the original time does not go in, when you look at it just to see a rough, look at a surface, When you like to read the text, you can, go buy a Hubble telescope to observe the vast universe, there are some new shapes, colors I can go to**, we go to study, so I think it's also a good idea, <>

But if it is specifically to engage in similar research on Mengxi, then, I still have to use the detector, because this is indeed more comprehensive, and more specific and his accuracy is also relatively high, including the overall data aspect, I think it is better, because we are buried in the 21st century, and we have a relatively small understanding of the universe, so I hope that in the future, we human beings will have more and more discoveries or exploration capabilities for the universe, and they will become stronger and strongerAt that time, I think I can really express my own views on the universe, and I think it was also an extraordinary time at that time, because it was indeed too far away from us at that time, and it was almost impossible, but although it was possible, it would have to go through many years of development and change, and I hope that day will come sooner. <>