Non-Silent Civilization

It is impossible that the time and space we live in has nurtured only one intelligent civilization. How will other civilizations meet in the dark? Will the outcome of the encounter be certain? Are humans lonely? Is the earth lonely? The difficulty of finding extraterrestrial civilizations in the universe cannot be described as finding a needle in a haystack, but if humans find that existence, what changes will happen to the solar system? Will humans still be lonely after more than 200 years? Classical physics gradually collapsed under the negation of quantum mechanics, and astrophysics is the mainstream of the universe. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.