The Sun has been on the main sequence
A) for about 10 million years.
B) for about 5 billion years.
C) forever.
D) for about 14 billion years.

Name: The Sun has been on the main sequence A) for about 10 million years. B) for about 5 billion years. C) forever. D) for about 14 billion years.
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Question

Quizplus · Accepted Answer

The Sun is approximately 4.6 billion years old and has been on the main sequence, where it fuses hydrogen into helium in its core, for about 5 billion years. This is the most stable phase of a star's life cycle.

The Sun Has Been on the Main Sequence