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.
There is not enough time spent in REM for most people so the cycle is tough to adapt to. The cycle consists of 4 x 30 minute sleeps throughout the day which totals only 2 hours of sleep! Some have adjusted the cycle to reflect a pattern of one 1.5 hour sleep with 2 x 30 minute naps and one 20 minute nap. Read more.