Here's why:
* More massive stars burn hotter and faster: They have a larger gravitational pull, which compresses their core and leads to higher temperatures and pressure. This intense heat drives nuclear fusion at a much faster rate, consuming their fuel more quickly.
* Fuel consumption: Stars fuse hydrogen into helium, releasing energy in the process. More massive stars have more hydrogen to burn, but they burn it at a much faster rate.
* Shorter lifespan: The faster fuel consumption of massive stars leads to a much shorter lifespan, often measured in millions of years.
* Less massive stars burn slowly: Smaller stars burn their fuel at a much slower rate, resulting in lifespans that can be billions of years. Our Sun, for example, is expected to live for about 10 billion years.
In addition to mass, other factors that can slightly influence a star's lifespan include:
* Composition: The initial composition of the star, particularly the percentage of heavier elements, can affect its lifespan.
* Rotation rate: Stars that rotate faster can have slightly shorter lifespans due to the increased energy loss from their magnetic fields.
In summary, a star's mass is the dominant factor determining its lifespan. The more massive a star is, the shorter its life will be.
