* Massive Stars: These stars burn through their hydrogen fuel much faster due to higher core temperatures and pressures. They might only stay on the main sequence for a few million years.
* Small Stars: Stars with much lower mass have cooler, slower-burning cores. They can spend billions of years in the main sequence, some even trillions of years!
Here's a general idea:
* Sun-like stars (our Sun): Around 10 billion years on the main sequence.
* Stars twice the mass of the Sun: A few hundred million years.
* Stars 10 times the mass of the Sun: Only a few million years.
* Stars 100 times the mass of the Sun: Only a few hundred thousand years.
Key takeaway: The more massive a star, the shorter its main sequence lifetime.
