when will the star fall into earth

It is very unlikely that a star will fall into Earth. Stars are much larger and more massive than planets, and they typically go through a series of stages of evolution before they reach the end of their life cycle. The most common fate for a star is to eventually expand into a red giant or supernova, shedding its outer layers and leaving behind a dense core known as a white dwarf, neutron star, or black hole. Although it is theoretically possible for a star to pass close enough to Earth to cause a catastrophic event, the chances of this happening are extremely low.