* Fuel Consumption: Stars generate energy through nuclear fusion, primarily by converting hydrogen into helium. The rate of this fusion is directly related to the star's mass. Higher mass stars have much stronger gravity, which squeezes their cores and forces the fusion process to occur much faster.
* Fuel Supply: While high-mass stars start with a larger supply of hydrogen fuel, they burn through it at a much faster rate.
* Main Sequence Lifetime: The "main sequence" is the longest and most stable stage of a star's life. During this time, it is fusing hydrogen into helium in its core. Low-mass stars, due to their slower fusion rates, have main sequence lifespans that can be billions of years long. High-mass stars, on the other hand, have main sequence lifespans of only a few million years.
Here's a simple analogy: Imagine two candles, one small and one large. The small candle burns slowly and lasts for many hours. The large candle burns brightly and quickly, but its flame dies out after a much shorter time.
Examples:
* Our Sun (medium-mass star): Expected lifespan of about 10 billion years. It's about halfway through its main sequence stage.
* Red Dwarf Stars (low-mass stars): Lifespans can be trillions of years.
* Blue Supergiants (high-mass stars): Lifespans of only a few million years.
In summary: The more massive a star, the shorter its lifespan. This is because it burns through its fuel much faster due to the intense gravitational pressure in its core.
