In the (pre-Disney) Star Wars universe, supernaturally extended life is more common with the Sith lords and the Dark Side of the Force than with Light Side Jedi masters. Nonetheless, both sides had the potential to extend their lives in practice through the Force.
Generally speaking, the Sith craved power and immortality while the Jedi sought to become one with the Force, to flow with nature and its ways. The classic concept of yin and yang (the soft and hard way) at play here.