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.
The reason for this is because as time progresses during sleep, the alcohol is metabolized, and so you lose the sedative benefit that it provides. In addition, alcohol can really disrupt a stage of sleep called as REM sleep, and the predominance of REM sleep occurs during the latter part of the sleep cycle.