Environmental factors such as weightlessness in space, radiation, airtight isolation, weak magnetic fields, and circadian rhythm disturbances have extensive effects on human physiology and psychology. 31 , 48 Lack of sleep and poor sleep quality are common problems for astronauts in spaceflight. 51 As early as during the Apollo mission, although sleep monitoring was not carried out, it was found through astronaut interview records that almost all astronauts had problems such as sleep fatigue before flight. 1 Sleep is affected by the low temperature in the