How many additional years is the Sun predicted to remain stable on the main sequence?
Answer
Roughly another five billion years
The Sun is currently estimated to be about 4.6 billion years old and is situated halfway through its stable hydrogen-burning phase on the main sequence. Due to its moderate mass, which dictates a slower rate of fuel consumption compared to much more massive stars that burn out quickly, the Sun is expected to continue its current stable operation for a substantial duration. Predictions place the remaining lifespan on the main sequence at approximately another five billion years. This extended longevity provides the necessary long-term thermal stability required for complex life to evolve and thrive on terrestrial planets like Earth.
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