The Total Time the Sun Will Spend as a Main-Sequence

question 1

Multiple Choice

The total time the Sun will spend as a main-sequence star is:

• A) at least 200 billion years (2 × 10¹¹) years.
• B) about 1 million years.
• C) about 4.5 million years.
• D) about 10 billion years (10¹⁰ years).

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