Here's why:
* Lower Mass: Red dwarfs are the smallest and least massive stars.
* Slower Fusion Rate: Their lower mass means they have a much weaker gravitational pull, resulting in slower nuclear fusion rates in their cores.
* Longer Lifespan: This slow fusion rate allows them to burn their hydrogen fuel much more slowly. Consequently, red dwarfs have lifespans that are significantly longer than larger stars.
In comparison:
* Sun-like stars (like our Sun) have lifespans of about 10 billion years.
* Massive stars have lifespans of only a few million years because their rapid fusion rate causes them to burn through their fuel much faster.
Therefore, red dwarfs, due to their slow fusion rates and long lifespans, are the stars most likely to spend the longest time on the main sequence.
