Explanation Star is classified on the basis of spectral characteristics. There are seven major spectral types OBAFGKM is the spectral sequence. Here, O types are the hottest stars and M is the coolest. Sun lies in the spectral type G 2 . Lifetime of stars can be concluded from the relationship between luminosity and mass. The massive stars have high luminosities and it implies that, rate of energy generation through fusion is rapid in these stars although they are born with more hydrogen than the Sun, they also use it up that quickly, hence they have shorter lifetime than Sun and its converse is also true for least massive stars. Lifetime of massive stars is less when compared to less massive stars. Therefore lower mass stars are much more common as almost all the higher mass stars would have been died earlier. Mass of star A is approximately 1 / 6 times mass of star B. It means that star B is massive star and its lifetime is less as compared to star A

Lecture- Tutorials for Introductory Astronomy

3rd Edition

ISBN: 9780321820464

Author: Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden

Publisher: Addison-Wesley

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Chapter 5, Problem 6STP

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Chapter 5, Problem 5STP

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Lecture- Tutorials for Introductory Astronomy

Ch. 5 - Prob. 1HRP Ch. 5 - Prob. 2HRP Ch. 5 - Prob. 3HRP Ch. 5 - Prob. 4HRP Ch. 5 - Prob. 5HRP Ch. 5 - Prob. 6HRP Ch. 5 - Stars of the same spectral type have the same...Ch. 5 - Prob. 8HRP Ch. 5 - Prob. 9HRP Ch. 5 - Prob. 1STP

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