The Life and Death of Stars

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All stars in our galaxy and in all galaxies use the process of nuclear fusion to create energy, light and heat. The initial mass of the star is an important factor involved with the life of a star and helps to answer many other questions: how long will the star live, at what temperature will it emit radiation, and at what part of the electromagnetic spectrum will the radiation be emitted. Stars also make up much of the visible portion of the universe and help to illuminate gas, dust and even planets that may orbit a star. The following images serve to illustrate stars of different sizes and stages in their life:

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Part 1

Part 2

Part 3

Part 4