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1. The universe is 15 billion years old. If the 10 Msun , 1Msun , and...

1. The universe is 15 billion years old. If the 10 Msun , 1Msun , and .1 Msun were all formed at the very start of the universe, what evolutionary stage would they be in? (not a math problem)

a) What is the luminosity of all three stars in terms of solar luminosities?

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