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.
March 31, 2015. Sleep mode is a computer component that allows you to save power especially when using laptops. Using this feature is totally dependent on your preferences and usability. Once enabled, your operating system goes into a low power mode without shutting down. The screen and hard drive are usually switched off.