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On this day, in the conference room of the Central Command Center of the Expeditionary Fleet, a group of senior commanders were gathering to hold a meeting.

"Is Tesla still dormant?" Harashi asked in surprise, "I remember he has missed 23 consecutive high-level joint meetings."

"Yes, he has been dormant with his wife for more than ten years." Deputy Science Commander Rolla replied.

"Okay!" Yuan Shichen didn't say anything about this.

"However, I heard from the logistics department that according to Tesla's dormant plan, it will end in about half a year." Wang Yao, deputy commander of science, added.

After hearing this, Yuan Shichen nodded. In addition to Tesla, during this high-level contact meeting, the senior officials who were dormant were military commander Sergei and scientific commander Don Gilleshode.

The two of them are a little older and do have to sleep for a longer period of time, otherwise it will be difficult to reach their destination. They will see the black hole Cygnus-1 with their own eyes.

Subsequently, commanders from various departments and different fields reported on recent work and discussed some daily government affairs together.

In the second half of the meeting agenda, a huge blue star emerged in the center of the conference room.

Yuan Shichen took the lead and said: "Everyone, let's talk about your research results."

Suspended in the air is a special supergiant, a highly luminous blue variable star. The star spectrum is classified as b1la, and it is also one of the brightest stars in the Milky Way.

As early as the Earth Age, Dutch astronomer and mathematician illemjanszoonblaeu (the maker of the globe) had already observed this blue giant star in 1600. She was named Cygnus p (also known as Cygnus 34). Due to its stable nature, Cygnus p is also called permanent nova.

"Cygnus p is a very rare blue supergiant. It has a huge mass. After calculation, it can reach at least 57 times the mass of the sun, which is a little higher than the data measured in the Earth age. Her spectral type is b1 or b2, which means it is a very hot blue supergiant with a surface temperature of about 190,000 degrees Celsius, and most of the radiation is in the ultraviolet band."

As the deputy commander of science, Wang Yao, manipulated the computer while controlling the giant blue stars floating in the center of the conference room also changed.

In the universe, blue stars are hotter stars than the sun or sun.

How do blue stars form?

How high are the temperatures of blue stars?

According to Planck's Law, the star with the highest temperature should be dark purple, and the blue we can see should be the long-wave part of these blue stars. In fact, the mother star of human civilization, the orange-red sun, is a relatively low star in the universe, and the size and temperature are relatively low among stars!

Blue luminosity stars are very hot! Their surface temperature is at least 35,000 degrees, so the radiation energy they emit is also extremely fierce.

"After estimation, the total luminosity of Cygnus p reaches 660,000 times that of the star, far exceeding most red supergiants. But because her surface temperature is very high, her radius is much smaller than that of the red supergiants, about 71 times that of the city and 78 times that of the sun."

Wang Yao continued to introduce that the starry sun and the sun, the female star of humans, also appeared on the simulated starry sky in the conference room. They looked really pitifully small.

Although Cygnus P is considered a big blue star, she is far from the largest in the universe.

Human astronomers have observed that there are a large number of extremely rare supermassive blue stars in the famous Andromeda m31 galaxy. In the centers of many blue stars, there is also a supermassive black hole located near the Andromeda spiral galaxy. The mass of the black hole is about 100 million times the mass of the sun.

(Andromeda Galaxy is about 2.5 million light-years away from the Milky Way, and is a close neighbor of the Milky Way)

"Have you guessed the age range of Cygnus P?" Yuan Shichen asked leisurely as he looked at the blue stars in the center of the conference room.

"The latest calculated data is basically the same as those in the Earth's Age." Deputy Commander of Science Lola replied. "Although Cygnus p is less than 10 million years old, because of her large mass (the larger the star, the shorter the life), Cygnus p has evolved to the late stage of life. At present, she is losing her outer material at an astonishing rate, and it is likely to shrink and heat it in the future to become a Wolf-Raye star or explode directly into a supernova to end her life heroically."

Wolf-rayetstar: The star core exposed by massive stars losing their shells in the form of violent star winds during the hydrogen combustion stage. This type of star will collapse directly into the Schwarzsie black hole after death. The abbreviation is r-star, isn't it very familiar? The star r-104 that destroys the earth is the star r-104.

"So, it's not very dangerous when we pass through the star Cygnus!?"

Hallelujah, deputy military commander, asked. After General Sergey was dormant, he was responsible for the actual navigation of the expeditionary fleet.

"Of course there will be certain risks, but according to calculations, even if a supernova explosion occurs in Cygnus P, it will take at least several million years." Wang Yao explained to Hallelujah with a smile.

"Then, theoretically, a supernova explosion in Cygnus P will also affect the Nakajima galaxy?" Hallelujah continued to ask.

"It is indeed possible in theory, but the probability of posing a serious threat is extremely small."

Wang Yao operated the computer and simulated the energy diffusion model after Cygnus p on the star map evolved into a supernova, making it clear to everyone at a glance.

"Hallelujah, this is different from the star R-104. The real reason for the destruction of the earth is **, not natural disasters!"

This scene also reminded Yuan Shichen of the past conspiracy of the Tata civilization.

"Leader, are we really going to enter the Cygnus P-star system to conduct scientific research?" asked Rolla, deputy commander of science.

"Why not?" Yuan Shichen asked, "Highlight blue variable stars like Cygnus p are very rare."

Indeed, the Expeditionary Force passed hundreds of star systems along the way, and there was only this giant blue star. Moreover, Cygnus P is a short-lived planet, and her nuclear fuel consumes very quickly. Perhaps after shining for another million years, she will likely explode into a supernova.

Therefore, it is very important to understand more about Cygnus P in advance, which is also very important for human civilization located in the Naka-Sun Galaxy.
Chapter completed!