When this is over, the cycle starts over; the original star dies and becomes a white dwarf. White Dwarf The core of a white dwarf star surrounds itself with layers of hydrogen, which still burn, continuing to fuse.
REM sleep is important because it is the restorative part of our sleep cycle. Typically, you begin the sleep cycle with a period of non-REM sleep followed by a very short period of REM sleep. The period of non-REM sleep is made up of stages 1 to 4. Each stage can last from 5 to 15 minutes.
Every night during REM sleep (when dreams occur), the body shuts down voluntary muscle activity, inducing a state of paralysis known as REM atonia, or REM sleep paralysis. The idea is to prevent you from acting out your dreams. Occasionally, this state carries on for a brief while after a person wakes up.