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Main Sequence Stars
The main sequence stars are powered by the fusion of hydrogen into helium in their cores. About 90% of the stars in the Universe are main-sequence stars, including our sun. They usually range from one-tenth to 200 times the Sun’s mass.
Blue Stars
These types of stars are quite rare with spectral types of either O or B. Their temperatures are around 30.000 K, with luminosities around 100 to 1 million times that of the Sun. They usually have a mass around 2.5 to 90 times that of the sun and last about 40 million years
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