The luminosity of the red giant during its second trip to the upper right on the H- R diagram is less than before the helium flash expansion.
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Q3: Paradoxically, while the core of the red
Q4: Once the helium flash occurs at stage
Q5: The initial rise off the main sequence
Q6: All stars have roughly the same luminosity
Q7: About 90% of the star's total life
Q9: The main reason that stars evolved off
Q10: Helium fusion requires a higher temperature than
Q11: The helium flash increases the star's luminosity.
Q12: The least massive red main- sequence stars
Q13: The helium flash stage lasts several thousand
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