Galaxy's Wet Dream

In 1054 AD, people on Earth thousands of light-years away witnessed an astronomical spectacle. A bright star suddenly appeared on the horizon. People could even see it during the day. However, thousands of years ago, at the location of this star, a dazzling galactic civilization was born in a pair of binary planetary systems. When the entire civilization was about to move towards a secondary civilization. The endless demand for energy from the central star caused the central star to explode as a supernova, and the entire galaxy instantly turned into a gorgeous fireworks in the universe. The surviving residents of the galaxy had to become wanderers in the universe. When Gallo returned here again many years later, it had become a nebula, and this ruin is what people on Earth now call the Crab Nebula. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.