GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The region on the H-R diagram consisting of 90% of the stars where surface temperature increases as absolute brightness increases
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spectrograph
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apparent brightness
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absolute brightness
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Hertzsprung-Russell diagram
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main sequence
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Explanation:
Detailed explanation-1: -Typical stars like our Sun are Main Sequence stars. Since stars spend about 90% of their lives in the Main Sequence phase, powered by nuclear fusion of hydrogen in their cores, this is the most densely populated region of the HR diagram.
Detailed explanation-2: -Our computer models of how stars evolve over time show us that a typical star will spend about 90% of its life fusing the abundant hydrogen in its core into helium. This then is a good explanation of why 90% of all stars are found on the main sequence in the H–R diagram.
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