This is a science fiction novel based on science. It introduces the basic conditions that the alien planet should have to be suitable for human survival when humans immigrate to alien planets:
1. The planet should have an atmosphere. The composition of the atmosphere should be almost the same as that of the earth, the pressure of the atmosphere should be similar to that of the earth, and the surface gravity of the planet should be almost the same as that of the earth;
2. It must be an Earth-like rocky planet with calm crustal activity;
3. The most important thing is that it is protected by a magnetic field, has sufficient light, and most areas are suitable for human habitation.
At the same time, it describes all kinds of unexpected and strange things that a spacecraft can or will encounter when flying to an alien planet.
Concept: A spaceship is loaded with immigrants to an alien planet, encountering unexpected encounters in the universe.