Their invention, the pineal gland simulator and regulator — or “Pinacal” — simulates the effects of sunset and sunrise in order to stimulate hormones, which in turn causes astronauts to experience a ...

Daily Routine: Astronauts follow a strict schedule that includes work, exercise, meals, and sleep. They typically work 12-14 hours a day, conducting experiments, maintaining the spacecraft, and ...

In space, astronauts’ sleep cycles are thrown off due to the difference in day and night cycles, which can lead to health issues, such as fatigue. Their invention, the pineal gland simulator and ...