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Tonyt Tonyt
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3 days ago

The lower edge of the main-sequence band represents the location in the H-R diagram at which stars begin their lives as main-sequence stars. What is it called?



the zero-age main sequence



the birth line



the Coulomb barrier



the evolutionary track

Textbook 
ASTRO

ASTRO


Edition: 3rd
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KocojdaKocojda
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Tonyt Author
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I appreciate what you did here, answered it right Smiling Face with Open Mouth
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