What if our planet would orbit UY Scuti or some other giant star?
There are many things, what can be different, planet Earth would orbit some blue star, like Rigel, or a red giant like UY Scuti (1). The thing is that those stars are so hot, that our planet must orbit much farther from them than it orbits the Sun. And that means that the orbiting time of our planet would be longer and that maybe means nothing. in everyday life, and the creatures, what are living on that planet would have of course different type polarization in their eyes than we have, but there is one thing, what that super-bright star would cause to those creatures and that is that their way to observe the universe can be different than ours.
Because the orbiting time of planet would be extremely long, and that may take even hundreds or thousands of years, their angle to see stars would be more limited than our way to see the stars. And that means that if the lifetime of those creatures would be similar to us, the astronomers of that hypothetical civilization would not see the entire zodiac in their lifetime, and that thing might make their way to see things differently. The bright central star would just cover the part of their observation area, which is tighter than our observation area.
Because the central star would be so bright, that means the astronomer, what lives on that planet can start the observations later, because the bright central star would destroy the instruments. And this is one way to see things, what might be a reality in the life of some creatures. But let's start to think about the thing, what can be real in some planets, what are orbiting the red giant stars.
The case can be that the open double star system the heavier star has turned to a red giant. And the other star with the planetary system can orbit the red giant. In that case, the giant star would be sometimes behind the central star of the planetary system, and that thing can make the way to see the universe more extraordinary than we thought in the case, where the planet orbits the red giant. And the sky would look more interesting and different than in the case, where the planet orbits a single red giant star.
Could the hypothetical aliens, what are living on the solar systems what are orbiting the giant star be dangerous to other civilizations?
The answer is that every intelligent species is dangerous, and the thing, that makes them dangerous is technology. If those hypothetical aliens would need to flee their solar system, that would cause the situation, that there is forming so-called grasshopper civilization, what wants to conquer and destroy planets for their machines.
In the worst case, those aliens would need to flee very fast. That means that the aliens would not anyway prepared to move and that kind of case would be in the front of the civilizations, what is polluted their home planet. In this hypothesis, there is one single planet in the solar system, or the other habitable planet would be destroyed suddenly.
This case can come in front of the eyes of civilization, which would produce their food in another planet. Then the giant asteroid would suddenly destroy that planet, and this causes hunger. Another vision is connected to Red Giants. In this scenario, the solar system would suddenly come near civilization, and that means that they are facing an unexpected situation. Their own star would travel fast in the Galaxy, and then the giant star would pull it and it's planets to the orbital trajectory of those stars.
There is still a possibility, that this civilization would act civilized and don't make hostile actions against other races. But the thing is that we have no officially confirmed contacts with other civilizations, and that means that we don't know any case, where that thing has been happening. And in the worst case, the culture of that civilization would be like some ants. When one of them would be injured, that can cause the war between civilizations.
When we are thinking about the situation, that the planet would travel between the stars, there would not be night. In this scenario, the stars would be quite far away from each other, that the plasma-bridge between them would be so thin, that the plasma doesn't burn the surface of the planet, and that might cause the wonderful aurora borealis. But if this hypothetical planet and its hypothetical civilization would be true, there must be one thing, what we might want to ask about them.
That thing is are those creatures afraid of death? The red giant stars are near the end of their life, and blue giants are not living long. So if we are thinking about the hypothetical civilization that civilization is facing the case, that it must move to another solar system. If the red supergiant would explode, the entire solar system would turn to gas, and in that case, the civilization must find the new home from the universe.
The thing, that those hypothetical aliens need or want is the planet, where it is not own lifeforms. That kind of world is easier to transform into habitable than the worlds, where are lifeforms. But it's the possibility that those aliens would be hostile. And that makes the SETI (Search for Extraterrestrial intelligence) so interesting and at the same time so complicated program. Everybody wants to make contact with other civilizations, but at the same time, we hope that there would be no contact. But we must keep our mind open, and prepare for things, what we cannot even think about. Or they can start to benefit the remainings of that star as the energy source.
In this kind of hypothesis, civilization might be bought more time by moving to planets and space stations, which is farther away from the central star, but sooner or later the ending is coming. If the star just erupts as nova the civilization can just return home for a while, but cooling remains of the star forces it to move, or that civilization can start to benefit the energy of white dwarf. They can just drive material to the core of that star, and start to use the white dwarf as the power source by benefitting the impact energy of the material, what releases when it impacts the layer of that very small but massive star.
And what if the result of eruption is a black hole? The entire solar system would be destroyed, but the advanced civilization would turn to live in the artificial platforms, which might be Dyson's spheres. The artificial planets, what would give the food and energy supply to those creatures, and they can start to benefit the energy, what is leaving from the transformation disk or the jets of the neutron star. So, in this case, civilization would not want the war, but of course, it can defend itself. And I just said that every civilization is dangerous.
What if the Sun would be replaced by the biggest known star? - Universe Sandbox 2: https://www.youtube.com/watch?v=KRMDSzBlsJI
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