Question

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?
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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. Astronomers estimate that it will remain in this phase for approximately **5 billion years** before it exhausts the hydrogen in its core and starts its next phase of life.

So, the correct answer is:
**Main Sequence; 5 billion years**.