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Text Chapter 31 Sgr A*

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    Bai Yang immediately informed his father of this important discovery.

    The old man is still there, he waved his hand and said, what kind of important discovery is this?  What a big deal, if the painting on the wall disappears, it means the putty has been shoveled. Something will happen in the future that will make all the putty in your room be shoveled and repainted, believe it or not?

    If you don¡¯t believe me, I¡¯ll leave the words here and wait, and you¡¯ll come back to read it later if something really happens.

    Pop acted like a prophet.

    Bai Yang scratched his head. After he found that the image on the wall disappeared, he had filled up tens of thousands of words of the plot of a sci-fi blockbuster, such as parallel universes, multiple histories, jumping world lines, twists and turns, and exciting.  , ready to cross the layers of the world to save Makise Kurisu and Dudulu, but the father gave the truth out.

    Bai Yang turned his gaze to Uncle Wang at the tea table.

    Old Wang didn't even raise his head, he had no interest in what Bai Yang said, and only cared about signing his name on the article written by Xiao Zhu.

    Bai Yang had no choice but to turn his head and look back.

    Lian Qiao leaned against the door of the room, spread her arms and shrugged.

    ¡¤ ¡¤

    ¡¤ ¡¤

    ¡¤ ¡¤

    Zhao Bowen is in a meeting.

    It's not at the provincial and municipal committees, but at the Purple Mountain Observatory.

    He was in a normal meeting today to report on the current work progress of the headquarters, but he suddenly received news from Zitai, and quietly turned on his phone to see that he had made a major discovery.  Once lost, the table was pushed, the chair was dragged, and he ran away, leaving a group of leaders stunned.

    The leader quietly asked the secretary if his house was on fire.

    "Could it be clearer?" Zhao Bowen frowned. There was a photo on the ppt, and a stack of photos spread out on the table in front of him.

    "Uh Teacher Zhao, you also study physics, and you know"

    "I just want to know, can it be clearer?" Zhao Bowen interrupted him.

    The background color of the photo is black, with a few white dots scattered on the black background, like chalk dust scattered on the blackboard, and a dark red arrow pointing to a dim dot in the center of the photo.

    The label below is sgra.

    Zhao Bowen, a pure layman in astronomy, also knows that sgra is a star of Sagittarius A. The speck the size of a sesame mung bean in the photo is actually a super giant black hole with a mass of 4 million times the sun. Sitting in the conference room, it is not obvious at all.  , Zhao Bowen's head can't imagine how much the mass of 4 million suns is, but fortunately the director explained that it is a black hole, not a star, so although its mass is as big as 4 million suns  , but its diameter is actually only 40 million kilometers.

    The photo in Zhao Bowen's hand is an enlarged version of sgra, the resolution is lower, and the color is black and white. The dim white dot on the ppt is magnified a few hundred times and it is in Zhao Bowen's hand. The resolution is even better than black sesame paste  It's blurry, but the structure can still be seen roughly¡ªa vague, hazy ring without any detail.

    Old Zhao inexplicably remembered the big eye he saw that night. It was a similar pupil. This association made Zhao Bowen shudder. Isn¡¯t the characteristic that black holes cannot escape even light similar to that eye?  When Zhao Bowen looked directly into the huge eyes, he felt that he saw the abyss.

    This photo is the result of the labor of the astronomical team over the past month.

    The astronomical team has undertaken the most important and also the most blind task among the various expert groups, which is to analyze and judge the possible source of the black moon. The teacher's draft has pointed out the direction - the Milky Way, the black moon comes from the Milky Way,  It is not born and bred on the earth, this is a crucial clue, and it is very reliable, as reliable as the teacher told you before the exam that the scope of the exam is the entire book.

    With such a clue, the astronomical team also felt

    After rigorous deduction, precise analysis, devout prayers and blind votes, everyone agreed that the most valuable target was the super-giant black hole in the center of the Milky Way, so the long guns and short cannons on the earth turned their heads to focus on the center of the Milky Way¡ª  ¡ªHey, don¡¯t tell me, it¡¯s really rewarding.

    They found that the fine shadow structure of Sagittarius a is not quite as expected. There may be multiple gravitational sources outside the accretion disk. Further observations in the X-ray frequency band revealed that a part of the energy disappeared.

    Although Zitai has repeatedly emphasized that this is entirely possible to be a natural phenomenon, after all, the universe is full of wonders, but Zhao Bowen is already slapping the table excitedly: black hole city!  This is the black hole city!  That's where the black moon comes from!

    "Is this the latest achievement?"

    Zhao Bowen calmed down.

    "Old achievements, the research on supermassive black holes in the astronomical community can be said to be the first.We have been working with our colleagues in Europe and America, including UCLA and the Max Planck Institute. Didn¡¯t the world¡¯s first black hole photo just come out in the first half of this year?  They built an eht, called the Event Horizon Telescope, which also uses VLBI technology. It took pictures of the supermassive black hole in the Virgo m87 galaxy. The black hole is very large, with a mass of 6.5 billion times the sun. The virtual aperture of their telescope is equivalent to the diameter of the earth.  .  "

    "Can it be confiscated?" This was the first thing Zhao Bowen thought of.

    "Ms. Zhao, that's from abroad." Someone reminded in a low voice.

    "Can you cooperate?" Zhao Bowen changed the word.

    "We have already cooperated." The reporter replied, "This observation plan has contacted the eight radio telescopes of eht, but the time is too short and the plan is hasty. At present, this effect can only be achieved. After all, they are preparing to photograph the black hole of m87.  ten years."

    "We need to see more clearly." Zhao Bowen tapped the wooden tabletop with his knuckles.

    "It's possible, but it needs a longer baseline and longer observation time." The reporter on the stage said, "The results we have seen so far are the lamost and Miyun in Beijing, the Shanghai Observatory, Australia, and North America.  , and several telescopes in South America, this kind of intercontinental cooperation is already the largest baseline within the scope of the earth, and the baseline cannot be extended, only the observation time can be extended.¡±

    "We don't have ten years. After ten years, the day lily will be cold." Zhao Bowen shook his head, "We can only make the telescope a little bigger."

    Zhao Bowen pushed his glasses, and he showed another good quality of Party A: I don't care what you do, I just need you to do it.

    But the telescopes with the diameter of the earth are not enough, how can we build a telescope with a larger diameter?

    "I can roughly understand what is going on with vlbi. Multiple radio telescopes are networked to form a virtual large-aperture telescope. If we can pull the telescope far enough, the aperture of the virtual telescope will be larger." Zhao Bowen said, "  In this case, we might as well use the revolution of the earth itself, the earth itself is rotating, and the movement of the earth itself can form a huge baseline, ideally the baseline can be as long as the diameter of the earth's revolution, almost two astronomical units."

    Zhao Bowen excitedly added:

    "This is similar to a telescope with an aperture as large as the earth's orbit!"

    "But vlbi needs simultaneity"

    Someone reminded me weakly.

    "It must be difficult and requires technical breakthroughs. I know everyone can solve the problem." Zhao Bowen ignored the protest of the astronomy team and opened the second folder, "Okay, let's start the second topic.  "

    Zhao Bowen looked down.

    "How to capture Voyager and Pioneer? If you have any ideas, please speak freely, and those who have a plan can lean forward."

    "Wow¡ª¡ª" There was a harsh friction of chair legs, and everyone in the conference room took a step back in unison.
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