Double Stars Are Not Confused

Legend has it that the earth once had two satellites. The embryonic earth could not withstand the gravity of the two satellites and might fall apart at any time... Later, by chance, the earth collided and merged with one of the satellites, and finally stabilized, and the remaining satellite was the moon. In today's human society, this is just a scientific conjecture about the early earth; but for Fang Xuantian, this is a fact - because he has experienced it. In that war about the ownership of the earth, no one was a loser. Both sides shook hands and made peace, sharing this new planet. But the universe is not peaceful. Advanced civilizations regard backward civilizations as nothing more than grass and invade and destroy them wantonly. Even outside the universe, many unknown existences are ready to move. But the earth is by no means as fragile as it seems, because what protects it is...