Main+Sequence+Stars+4B


 * characterized by their source of energy
 * all undergoing fusion of hydrogen into helium in their cores
 * star spends most of life in main sequence stage
 * main sequence stars get there energyfrom the burning of hydrogen in the core
 * stars spend most of their life burning hydrogen in their cores which makes the main sequence the most populated group in the HR diagram
 * majority of stars in the galaxy including our sun are all main sequence stars
 * our Sun will spend about 10 billion years as a main sequence star before evolving into a red giant
 * main sequence stars vary in mass and lifespan, but mass is a huge factor in what determines a star's lifespan
 * main sequence stars are characterized by the source of their energy
 * all stars main sequence stars are undergoing fusion of hydrogen into helium in their cores