* Brighter: Larger stars are much more massive than smaller stars. This means they have a greater gravitational pull, which compresses their core to extremely high temperatures and densities. These extreme conditions lead to much faster nuclear fusion rates, producing immense amounts of energy and making them brighter.

* Shorter Lifespan: This intense fusion also means that the larger stars burn through their nuclear fuel at a much faster rate. While smaller stars can last for billions of years, massive stars may only live for a few million years before exhausting their fuel.

Here's a simple analogy: Imagine two candles. A small candle with a thin wick burns slowly and lasts a long time. A large candle with a thick wick burns brightly but burns out much faster.

Key Takeaway: The larger a star, the brighter it is, but it also has a shorter lifespan.