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Minchanka [31]
3 years ago
15

When a low mass star first runs short of hydrogen in its core, it becomes brighter because?

Geography
1 answer:
deff fn [24]3 years ago
7 0
It becomes brighter because, THE CORE CONTRACTS, RAISING THE TEMPERATURE AND EXTENDING THE HYDROGEN BURNING SHELL OUTWARD. This stage is called the hydrogen shell burning phase and during this phase the star grows luminous. 
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