Voyage of the Stars

(ps: please buy the original version and collect it (ω))

Humans are already very powerful to achieve this step. When the data was transmitted to Tianqin by scientists, and even when the news of these achievements was seen by the scientists of the civilization of the Star Alliance, they were shocked beyond words.

Black hole! The most extreme celestial body in the universe, the scientists of the civilization of the Star Alliance never thought that they would see the news of exploring black holes one day, but they saw it here. Against the backdrop of extreme celestial bodies such as black holes, the powerful material technology of human beings has once again refreshed their cognition.

However, this is not the end. After the third batch of exploration spacecraft completed its experimental mission, human scientists sent the fourth batch of exploration spacecraft to the black hole again. Well, the word "approval" for the fourth batch is not very accurate, because there is only one exploration spacecraft this time.

This is the exploration spacecraft that humans made after deciding to explore this black hole initially.

This spacecraft is not big, only about three kilometers in size. From the perspective of volume, it is obviously a lake-class spacecraft. For its stability, humans made its appearance into an eggshell structure, and used strong materials, and the same is true for the frame.

It is filled with various technological creations made with gravitational potential well technology, the purpose of which is naturally to generate a corresponding gravitational field to protect the important instruments and equipment inside the detection spacecraft.

It can be said that it is a strong material detection spacecraft. The production process of strong materials is very high. It takes a lot of time and cost for humans to make such a detector. It can be said that in order to conduct scientific detection of black holes, humans have really spent a lot of money this time.

And such a carefully built detection spacecraft really lived up to expectations. It successfully crossed the farthest distance of human creations before, crossed the threshold of four times the radius of the black hole, and its internal instruments remained in normal operation. Such a result made scientists feel relieved and excited at the same time.

"Hold on! Keep going! Keep going!"

Because this experiment was broadcast live on the human network platform, everyone who paid attention to the progress of the scientific experiment prayed silently in their hearts.

As this carefully built detection spacecraft got closer and closer to the black hole, everyone's heart became more and more tense.

With the improvement of civilization level, human beings have accumulated more and more scientific and technological knowledge. Therefore, the time required for human beings to start learning and graduate has increased from 50 years to 80 years, and the time required for specialized knowledge has reached 100 years.

There is no way. There are more and more branches of science, and the number of required courses has increased accordingly. Human beings attach great importance to the development of science and even above science, so learning is naturally indispensable.

It is precisely because of this that ordinary people have good scientific literacy, so they know what it means to cross four times the radius of the black hole, which means that human creations will flood into the area of ​​three times the radius of the black hole.

Well, this is not nonsense.

Because the so-called black hole three times the radius orbit area is actually the innermost stable circular orbit of the black hole, the innermost critical orbit where a mass object can stably run around the black hole, and it is also the destination that humans expect the detector to reach in this black hole exploration operation.

Beyond this orbit, no matter what it is, as long as it has mass, it will lose its stable orbit and fall into the black hole at near the speed of light.

Black holes are so magical that no intelligent civilization can resist the temptation to explore them.

Under the watchful eyes of the crowd and with everyone's heart hanging in the air, the exploration spacecraft made of strong materials finally successfully reached the outer edge of the black hole's three-times radius orbit after circling the black hole several times. The critical innermost stable orbit in the calculation of its close orbit distance around the black hole is only 1,700 kilometers away.

Yes, close orbit!

Since this black hole is formed by the merger of black holes formed by the collapse of stars as predicted by scientists, it is not a stationary black hole, but a rotating black hole. The difference between a rotating black hole and a stationary black hole is that a stationary black hole is spherically symmetrical, while a rotating black hole is an axially symmetrical ellipsoid.

Such a black hole will pull the surrounding space-time to rotate with it. This kind of rotation belongs to the rotation of the reference frame, which is very different from the orbiting phenomenon and has very important research significance. Therefore, the orbit of human creations here is naturally elliptical, so there are far and near orbits.

More than a thousand kilometers is considered face-to-face on an astronomical scale, so humans cannot let this exploration spacecraft get any closer. If it goes any further, humans will lose this exploration spacecraft that has taken great efforts. This exploration spacecraft is not used to crash, but to continuously observe black holes at close range, so it is considered a success here.

Then, the exploration spacecraft aimed at the black hole for "face-to-face" observation, and such observation also brought humans a new perspective on observing black holes, enriched the human scientific database and refreshed the impression of black holes in human concepts.

As time went by, the exploration spacecraft presented the appearance of the black hole photon ball to humans intuitively.

Yes, photon ball.

The reality in the human holographic screen is not a dark black hole, but a black hole covered by a layer of vast light ball on the surface. This is completely different from the black holes that humans usually see in pictures on the Internet. It is not a pattern of black inside and a circle of light outside, but there is no black but only a vast light ball. However, that light ball is obviously different from the light of a star. It appears very distorted, so that human detectors can see themselves in their own lenses.

Of course, it cannot be seen all at once, but is the result of long-term exposure, because there are too few photons entering the detector in a short period of time to form an image.

People know that this phenomenon is the result of light hitting the surface of the detector and then being diffusely reflected, and then being distorted by the black hole and returning to the detector's optical receiving device after a circle.

As time went on, people discovered another magical phenomenon. From the time of the peripheral detectors, it can be seen that no matter where the detector is in the black hole orbit, the silhouette of the detection spacecraft that has almost reached the innermost stable circular orbit can be seen.

From the perspective of other peripheral detection spacecraft, the strong material detection spacecraft seems to have countless clones all of a sudden, spread all over every corner outside the black hole photon ball.

The distortion of time and space makes human senses have illusions.

Amid the cheers of the people, human scientists began to conduct experiments on black holes based on this detector, such as emitting photon beams to it, observing with various detection methods, and so on.

After a series of observation experiments, human scientists also confirmed a previous human theoretical solution to the black hole photon ball, and the fact proved that the solution was correct.

It refers to the region between the 1.5 times Schwarzschild radius orbit of the black hole and the Schwarzschild radius surface of the black hole, i.e. the event horizon of the black hole, which belongs to the photon sphere of the black hole.

Here, the massless particles such as photons can run stably. The photons coming from all directions of the universe will bend here due to the strong gravitational force of the black hole. Many photons will turn around here and eventually become a light shell. This is what humans see from the holographic screen.

However, because there are not many photons, this layer of light shell appears very light.

When human scientists transform the perspective into the data perspective of tachyon detection feedback, humans see a more magical scene again.

From the perspective of tachyon detection, the "black" radius of this black hole suddenly expanded by 1.5 times from the Schwarzschild radius.

And this phenomenon verifies another phenomenon solution of the photon sphere related to the human theory of black holes.