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What is a star's main fuel during its lifetime? A. hydrogen B. carbon C. helium D. oxygen
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What is a star's main fuel during its lifetime? A. hydrogen B. carbon C. helium D. oxygen

User Nogusta
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The star's main fuel during its lifetime is hydrogen. It is said that a star is composed of 97% hydrogen and 3% helium. Once the hydrogen of a star is gone, the star becomes old because it burns hydrogen during its lifetime.
User Tonfa
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