"Innumerable stars" is a phrase used to describe the vast, seemingly endless number of stars in the universe. It conveys the idea that the stars are so numerous that they cannot be counted or even imagined.

Here's why it's used:

* Immensity of space: The universe is incredibly vast, and we can only observe a small fraction of it. Astronomers estimate that there are trillions upon trillions of stars in the observable universe.

* Limitations of human perception: Even if we could count them, the sheer number of stars overwhelms our ability to grasp their magnitude.

* Metaphorical use: The phrase is also used metaphorically to represent something that is extremely abundant or difficult to quantify, like the grains of sand on a beach or the possibilities in the future.

In short, "innumerable stars" emphasizes the overwhelming abundance and vastness of the celestial bodies that populate the universe.