Asked by Damianah
How old is the sun?
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About 4.6 billion years.
More precisely, the Sun (and solar system) formed roughly 4.56–4.57 billion years ago. That age comes from radiometric dating of the oldest meteorites and from models of stellar evolution. The Sun is therefore about halfway through its ~10-billion-year main-sequence lifetime; in roughly 5 billion years it will swell into a red giant and later end up as a white dwarf.
More precisely, the Sun (and solar system) formed roughly 4.56–4.57 billion years ago. That age comes from radiometric dating of the oldest meteorites and from models of stellar evolution. The Sun is therefore about halfway through its ~10-billion-year main-sequence lifetime; in roughly 5 billion years it will swell into a red giant and later end up as a white dwarf.
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