Stars expend about 90% in their lifetimes fusing hydrogen into helium in high-temperature-and-pressure reactions in their cores. This kind of stars are mentioned for being on the key sequence and so are named dwarf stars. free of charge!|This process releases Power that traverses the star's interior and radiates into outer https://andres961g8.thelateblog.com/27262758/not-known-factual-statements-about-star