Three days after the sun returned to its normal temperature and speed of light, a solar storm so large that it was almost indescribable reached Earth. The aurora appears again at the Earth's South and North Pole, obscuring nearly the entire sky.
Because a strong solar storm was long expected to strike, human beings on Earth have long been prepared to meet the solar storm. Above the earth, all electronic instruments that can be shut down are shut down, the power grid network is placed in safe mode, satellites are temporarily shut down and go to sleep, and almost all household appliances, computers, mobile phones and other equipment are also shut down.
More than a dozen astronauts working in the Skylab have returned to Earth, and the Skylab has also adopted a safe mode, shutting down most of the instruments, leaving only the most heavily protected core instruments still running at the lowest power run.
