Our sun is in which phase of its life? Nuclear fusion will burn all of the hydrogen in its core and then it will begin its next phase of life. Astronomers estimate this will be when?

Question

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1 point
Main Sequence; 5 billion years
Protostar; 5 billion years
Main Sequence; 2 billion years
Red Giant; 5 billion years

Answer 1

Our Sun is currently in the Main Sequence phase of its life. It is estimated that the Sun will continue in this phase for approximately 5 billion years before it exhausts the hydrogen in its core and transitions to the next phase of its life. Therefore, the correct answer is:

Main Sequence; 5 billion years.