Stars spend about 90% of their lifetimes fusing hydrogen into helium in high-temperature-and-stress reactions within their cores. This sort of stars are mentioned to get on the principle sequence and so are named dwarf stars. cost-free!|This process releases Vitality that traverses the star's interior and radiates into outer space. At https://angelo95on1.prublogger.com/26513201/what-does-star-mean