Approximately how long can a K-type star remain on the main sequence compared to the Sun?

Answer

20 to 70 billion years

The Sun, a G-type star, lasts about 10 billion years, whereas K-type stars can burn steadily for 20 to 70 billion years, offering a much longer stable period for evolution.

Approximately how long can a K-type star remain on the main sequence compared to the Sun?

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