Here's why:
* Gravity's infinite reach: Gravity is a fundamental force that acts between any two objects with mass. It extends infinitely, meaning it doesn't weaken to zero even at vast distances.
* Other forces:
* Electromagnetism: This force governs interactions between charged particles, but its strength decreases rapidly with distance.
* Weak force: Responsible for radioactive decay, this force operates only at extremely short distances within atomic nuclei.
* Strong force: This force holds the nucleus of an atom together, but it's the strongest only at extremely short distances.
Examples of gravity's long-distance influence:
* Planets orbiting stars: Gravity keeps planets in orbit around stars, even though these distances are enormous.
* Galaxies: Gravity holds stars together in galaxies, and galaxies are bound together in clusters and superclusters.
* The universe: Gravity plays a major role in the expansion and evolution of the entire universe.
