After lunch, Gu Yu was supposed to go home as soon as possible.

But Futaba bought too many cooked dishes, and he was very enthusiastic.

So Gu Yu ate a little bit and drank some wine, plus the Ark City at the end of June, the weather was too hot in the afternoon, so he could only rest for a while before leaving.

After all, we have just learned the results of the college entrance examination, and everyone is happy, and it is not surprising that we are drunk and drunk.

At the dinner table, since we talked about Gu Play writing popular science articles and engaging in natural observations, Futaba had to pester his brother and ask him to say more.

Li Shuangye has completely inherited her mother's curiosity about science, and loves to listen to her brother's new discoveries in the scientific world, which is very different from most other girls who do not love science.

"Brother, I remember that before Professor Yuan left, he repeatedly reminded you that the topic you chose was not very easy to do, so why did you insist on observing the accuracy of the 'cosmic microwave background radiation'?

Gu Yu was in a good mood, so he was willing to give his sister a literacy: "Of course the difficulty is very great, but I am soft-spoken, and the choice is too narrow."

Even if I am gifted and can make better results in other subdivisions, I will be stolen by my predecessors, or those awesome journals will disdain to publish.

There is only that kind of cosmic observation, whoever discovers it is who discovers it, and whether the celestial body is there or not is a very objective and intuitive existence, everyone can verify it, and no one can snatch it away. ”

Futaba tilted his head and thought, "So, you're planning to discover a new star, constellation, or planet?"

Gu Yu smiled dumbly: "Your understanding of astronomy is too superficial, it is impossible to discover constellations, even if you do, contemporary people will not define new constellations, that is the division of star fields by the ancients."

The entire sky has been divided into all existing constellations, and if you find new galaxies or stars on the territory of this constellation, you can only name them as α constellations, β...... Row it up like this.

Let's talk about galaxies and stars. New galaxies are basically difficult, unless they are located in extremely far space, but this requires the astronomical telescope you can use to be super awesome to see-

So discovering galaxies and stars doesn't prove how awesome you are, at best, it's just a device you can use, and in this age, what is easy to find has long been discovered. ”

Gu Yu paused for a moment, and then turned around: "At present, it is relatively difficult and valuable to discover a celestial body, and it is a new exoplanet. Because the planet itself does not emit light, it is not visible when it is directly seen, and can only be seen when it is located in a specific position of its parent star, or in other special optical observation environment. This requires the observer to be lucky enough to look in this direction at a time when it can be seen.

But even so, if you find a star, there won't be many names, at most it will add points to the mixed title of teaching assistant in the astronomy department, or graduate students will mix up a graduation topic.

How many new stars do you think astronomers around the world discover a year, do you know the names of those who discovered them? I can't report any of them, and they rarely make it to the mass media. ”

Li Shuangye thought about it along his brother's train of thought, and it seemed that this was really the case.

Some things seem lofty, but the scope of the public is too narrow, and they are just talking about insiders.

For example, when two professors meet, they may talk about what awesome achievements I have recently, and people who know how to do it will also praise you, but in the eyes of social people, you are a "brick professor".

In modern times, the work of anti-superstition is more and more arduous, because cutting-edge science is getting farther and farther away from the understanding of ordinary people.

It's getting harder and harder for scientists to become popular celebrities. Either you're Newton Einstein, or you're as topical as Stephen Hawking.

Otherwise, you're a Nobel laureate in physics – you just pick someone on the street and ask him how many Nobel laureates he has been winning for nearly half a century?

I guess it's just Yang Zhenning's few.

Futaba suddenly felt that people who love science are really bitter.

But she still mustered up her confidence: "But since you have thought of this layer and still insist on choosing the topic of what kind of microwave background radiation, doesn't it mean that that the topic is enough to have a public opinion gimmick, and if it is published, it can help you brush up some popularity at once?

"Of course, the thing I'm going to observe, in nature, is the same as looking at the stars, but the gimmick is much bigger, and it can rub hot spots.

To put it bluntly, looking at the stars is to look at the bright points in the universe and the points with strong radiation. Looking at the microwave background radiation is actually looking at the darkest point in the universe, the place that is completely undisturbed by other stars.

You know the Big Bang theory, right? It was a hypothetical hypothesis that was put forward 20 years ago that the universe began with a Big Bang.

Twelve years ago, several scientists in Oceania stumbled upon the cosmic microwave background radiation, which can be used as important evidence for the Big Bang theory. Therefore, many people in the circle say that the two observers who discovered the microwave background radiation will become the favorites to win the award in the past few years.

So what is the principle of this kind of observation? Actually, at that time, they originally wanted to look at the stars, but before the observation, they had to calibrate the thermal radiation imaging mirror, so they pointed the mirror at a completely dark place in the universe and measured it in the air, and then the airspace measurement result should be calibrated to 0 - because theoretically, there should be no radiation at all in the pure black point in the universe.

But later they found that no matter how they calibrate, there is always an error of about 3K, that is, the radiation of minus 270 degrees, no matter how you look at it, they have an idea, and they figured it out: this thing, even the darkest point in the universe, also has radiation, which is the background of the universe. It is the residual temperature left after 14 billion years of cooling after the Big Bang. ”

Hearing this, Li Shuangye already seemed to understand something, but fortunately, she was also half a science tyrant, so she could keep up with her brother's train of thought.

She pondered for a moment, and asked incomprehensibly: "Since that thing has been discovered, even if you study it now, it will not be groundbreaking from scratch, just tinkering and improving a little accuracy, can it be very valuable?"

Gu joked: "Of course, discovering and defining the cosmic microwave background radiation is certainly a super achievement at the Nobel Prize/Western Prize level, but subsequent tinkering is also very valuable."

Because the 3K data was actually inaccurate, only 4 years later, in 90 years, when the two scientists discovered it, they lowered the data back to 2.8K and deducted 0.2K, because they found that the observation direction that they thought was 'completely pure black in the universe' for the first time was not really pure black.

With the improvement of the accuracy of astronomical telescopes and astronomical thermal imagers, we found that there were actually many stars and galaxies that were far away and far away at the point they were aiming at back then, and the heat radiated by those celestial bodies accumulated to be 0.2K, which interfered with the measurement of the real cosmic microwave background radiation.

Therefore, at this point, the problem is simplified: everyone should use an astronomical thermal imager, aiming at every point in the universe, measuring one by one, and maybe you can find a position that is darker than the "blackest point in the universe" that has been discovered so far. In that case, we can measure a value lower than 2.8K.

That's why I said that the difficulty of this is actually similar to stargazing, except that stargazing is looking for bright spots in the universe, and observing background radiation is to find the darkest point in the universe. But as long as you have results, the meaning you get is a hundred times more important than the discovery of a new star.

Because you are refreshing the fixed value of the underlying physical quantity that is common to the whole universe, it can even help scientists determine the life of the universe more accurately - we now think that the universe is 130~14 billion years long, which is calculated according to 'how many years it takes to expand from the singularity Big Bang to 2.8K'.

If this data becomes 2.7 K, or even 2.6 K, wouldn't that be equivalent to extending the cooldown time of the previous backward extrapolation? Then it may be written in future textbooks that the life span of the universe is 15 billion years -- the extra billion years will be given to the universe by the scientist who discovered more accurate background radiation values. ”

Li Shuangye listened leisurely and felt that his blood pressure had risen.

Indeed, what is it to look at the sky with the same astronomical thermal imager and find new stars?

And "discovering a more precise life span of the universe than scientists currently know" is very touching to think about.

And even elementary school students can talk two sentences, easy to understand, and can definitely become a scientist who can be called by name by ordinary people.

It's just that...... This is too difficult, isn't it? Other scientists have been observing for so many years, and they have not been able to find a darker point in the universe than the blackest point at present.

She told her brother about this question, but Gu Yu refused to reveal it again.

"I have some new ideas, but I believe more in my luck, maybe I can be blinded by me? Who made me the chosen one. ”

This answer is very nonsensical, and Li Shuangye doesn't believe it at all.

But in fact, it is infinitely closer to the truth.

Because someone gave him an answer.

Gu played in his mind and knew where the darkest point in the universe was. To be precise, he knows what coordinates the darkest point in the universe has been observed based on the astronomical observation experience of earthlings in the 21st century.

That's all the big data that earthlings have been using the Hubble telescope to scan the universe for decades and accumulate.

So Gu Yu only needs to act a little, and then aim directly in that extremely subtle direction. The accuracy of the telescope is not enough, and it can also be made up by the mechanical difference method, and the specific physical principles here are not explained much for the time being.

In short, he can copy the answer directly.

Lao Tzu is standing on the fritters on the airport island, blindly sniping into the sky, and killing the enemy on the birth island in seconds, are you not convinced?

You ask me how I managed to get a headshot from 800 miles away?

Lao Tzu is blind, but I have the corpses of the enemy as proof.

You can't say I'm a coerc.

It can only be said that it is a nerve gun, a child of destiny.

As for the disadvantages of the equipment, it is actually okay.

Because you're locking your head directly, it's not much different if you take a 15x lens or a machine sight.

It's just that you need to play more.

——

At the time of writing this chapter, it was 154 live fans...... I was a little apprehensive. When I wrote "The Terminator of Xueba", there were still 300 live fans when I raised my arms.

Do you think this book is too esoteric and not suitable as an online article?

If you feel that the pace is slow and too professional, you can talk to me.

I'm panicking right now, and I don't know if I should write it down. Now there are still few words, if the theme is really too profound, the cliff can also stop the loss by changing the theme, and it can also make the book friends of "80 Boss" love to read it.

Do you like to look at the pure reality background and want to do politics?

When I thought of having so many zombie fans, my thoughts were gone.

I knelt down, I don't have to give a reward to book friends who have already rewarded, but I haven't rewarded 1 yuan, I kneel and beg you to give me some confidence.

Because the book itself is very dangerous, after all, it involves such a high-end thing as cosmology, I need to know how big the scale of the starting point is, whether I have fallen into the information cocoon echo chamber, I don't know if I am laughing at myself.

Living fans prove that they are not zombies, which can greatly boost my confidence in writing. It's really not a lot of money, I just want the confidence of a living rate.

I also know that the middle class is more budget-conscious. Originally, I said that I would not be able to add more updates until the end of the new book period, but now I am going to add one update tomorrow and the day after tomorrow. As long as you get 200 live powder today, I will add it the day after tomorrow.

Of course, the follow-up 300~500 live powder will definitely be pressed to the back.

Of course, I hope it's because the number of words is low at present, and most living people don't read it every day, so I didn't see yesterday's kneeling and begging, so I can only comfort myself like this. Otherwise, the mentality will collapse.