The bright Senkaku IV in the Earth's night sky has long been of interest to astronomers, and records of its changing brightness have been ongoing for more than two hundred years.
The reason why Sensui IV has such high attention is that it belongs to the red supergiant, 640 light-years to 720 light-years from Earth it may supernova outbreak at any time, it is also targeted because of the frequent brightness changes before the supernova outbreak, Sensui IV even dimmed by two-thirds in 2019, such a magnitude of change makes the astronomical community believe that it is already in the pre-explosion, and may even have already exploded, only the information has not yet reached Earth.
Although three years have passed and we did not wait for the sudden flash of blue light in the night sky, Sensual IV is still alive and continues to approach the edge of the supernova explosion, but when astronomers observed Sensual IV again, they found something different in the seemingly unexploded Sensual IV.
Because the latest image data of Sensui IV shows that it has lost a large part of its photospheric layer at this moment, the original photospheric material has now been thrown into the space near Sensui IV, and this phenomenon is also the cause of its brightness plummeting by two-thirds in 2019, in other words: Sensui IV is leaking gas.
It is estimated that the total amount of photospheric material ejected by Sensui IV is equivalent to 4 trillion solar coronal mass ejections, which can be said to be a considerable loss of mass and volume, although the massive but weak nature of the red supergiant also determines that the material inside Sensui IV will gradually fill the area where this material is located, which in turn causes the overall density of Sensui IV to decrease.
Although it is impossible for even the most powerful astronomical telescopes to see the surface of an extragalactic star, astronomers can roughly model the current state of Sensui IV based on models of the evolution of stars, especially red supergiants.
After a large amount of photospheric material is thrown out in 2019, the remaining material will not fill the original gap quickly, so just as the sun will appear as a black child due to the difference in surface temperature, a giant black spot is bound to appear on the surface of Senju IV, caused by the local temperature drop caused by the disappearance of the photospheric material.
This "cryogenic wound" on Sensua IV will gradually shrink or even disappear in the next few years, but after the previously thrown-out photospheric material cools, it may be regained by Sensua IV's gravity and become a large molecular cloud revolving around Sensua IV, causing a decrease in Sensua IV's brightness whenever it revolves to the line between Sensua IV and Earth.
When the Webb telescope targets Sensual IV for a long period of time, it may be possible to find a dust cloud not far from Sensual IV, and thus to restore the current state of Sensual IV.
Of course, what people want to know more than the current unstable state of Senkaku IV is what would happen to the Earth if it blew up.
Historically, human civilizations have actually seen supernova explosions, such as the Crab Nebula supernova explosion recorded by astronomers of the Song Dynasty in 1054 AD, which directly led to the appearance of a star brighter than the full moon in the Earth's night sky, and people were even able to read books at night with the help of its light, a phenomenon that lasted for several months before fading away.
With the Crab Nebula currently 6,500 light-years from Earth and Sensui IV only 640 light-years away at its closest, the impact of a Sensui IV supernova explosion on Earth would never be as simple as just one more.
Considering the instantaneous energy release of the supernova burst, the high-energy radiation after the Sensui IV burst will fly for hundreds of years to reach Earth, during which the energy will certainly decay partly, and the remaining high-energy charged particles may interfere with the Earth's ionosphere like the solar wind, causing electromagnetic disturbances or major power outages on a global scale.
In more serious cases, all the equipment on Earth that uses electricity will be destroyed in the high-energy charged particle storm, and the entire human civilization will instantly go back three hundred years, back to the industrial revolution era.
The most serious consequence is that the dose and intensity of high-energy radiation far beyond human imagination, has been able to change from affecting inorganic substances to organic substances, then all life on Earth will be faced with ultra-high energy radiation from the Sensual Four, Earth life, including human civilization will disappear like bacteria under the sterilization lamp, completely and the universe to say goodbye.
The only relief is that, no matter how serious the consequences of the supernova explosion of Sensui IV, it has nothing to do with human civilization, because the speed of light limits our vision, we can never actively predict the time of the Sensui IV explosion, but can only passively wait for the predetermined end.
