The document summarizes the life cycles of stars of different masses, including our Sun. It describes that: 1) The Sun will spend most of its life fusing hydrogen into helium, then expand into a red giant in 5 billion years and shed its outer layers as a planetary nebula. 2) More massive stars live fast and die young, becoming red supergiants or exploding as supernovae after only a few million years. 3) The most massive stars may collapse into neutron stars or black holes.