Here's why:

* Universal Attraction: Gravity is a fundamental force of nature that acts between any two objects with mass. The more massive the objects, the stronger the gravitational pull.

* Distance Matters: The force of gravity weakens rapidly with distance. So, while you feel Earth's gravity strongly, the gravitational pull of a distant star is much weaker.

* Curvature of Spacetime: Einstein's theory of general relativity explains that gravity is not a force in the traditional sense, but rather a consequence of the curvature of spacetime caused by the presence of mass and energy.

Let me know if you'd like to learn more about gravity!