Stellar science is the study of stars, their formation, evolution, and eventual death. It involves understanding the physical and chemical processes that occur within stars, including nuclear fusion, which powers them. Researchers use telescopes and other instruments to observe stars at different stages of their life cycles, from nebulae where stars are born to supernovae marking their explosive end. This field also explores the impact of stars on their surrounding environments, including the formation of planets and galaxies. Stellar science contributes to our knowledge of the universe, helping us understand phenomena like black holes and neutron stars, which are remnants of massive stars.