Here's why:
* Constellations are patterns: Constellations are groupings of stars that humans have imagined to form shapes in the night sky. They aren't defined by a specific number of stars.
* Brightness and visibility: The stars in a constellation can vary in brightness. Some are visible to the naked eye, while others are much fainter and require telescopes to see.
* Modern vs. ancient: Historically, constellations were defined by the stars visible to the naked eye. Modern astronomy includes many more stars, so the number can seem much larger.
Instead of a fixed number, here's what you can consider:
* The Bayer Designation: This system labels the brightest stars in a constellation with Greek letters (alpha, beta, gamma, etc.). Hercules has 17 stars with Bayer designations.
* The naked eye: On a clear, dark night, you can see about 100 stars in the Hercules constellation with the naked eye.
* Telescopes: With a telescope, you can see many more stars in the region of Hercules. There are countless stars within the boundaries of the constellation.
So, while there isn't an exact number, Hercules is a vast constellation with many stars visible to varying degrees.