That's a tricky question! There's no single, definitive answer for how many stars are in the sky. Here's why:

* We can only see a fraction: The human eye can only see a few thousand stars on a clear night. Telescopes can see millions more, but even those are limited by their range and power.

* The universe is vast: The observable universe is enormous, with billions of galaxies, each containing billions of stars. It's impossible to count them all.

* Stars are constantly forming: New stars are born all the time, making the total number constantly change.

Estimates:

* Astronomers estimate that there are at least 100 billion stars in our Milky Way galaxy alone.

* There are estimated to be trillions of galaxies in the observable universe.

So, the number of stars is truly astronomically huge and impossible to count precisely!