How gravity shapes the universe

Gravity shapes the structure of the universe, influencing everything from falling objects to the motion of galaxies.

An invisible force

Gravity is one of the fundamental forces of nature. It acts between objects with mass, attracting them toward one another regardless of their size or composition.

Although it is the weakest of the fundamental forces, gravity dominates at large scales because it operates over vast distances.

From apples to planets

The effects of gravity can be observed in everyday life, from objects falling to the ground to the motion of tides. The same force that keeps our feet on Earth also governs the movement of planets around stars.

For centuries, gravity was described using the laws developed by Isaac Newton, which remain highly accurate for many practical applications.

Space-time and relativity

In the early twentieth century, Albert Einstein proposed a new understanding of gravity. According to general relativity, massive objects curve the fabric of space-time, and other objects move along these curves.

This theory successfully explains phenomena that Newton's model could not fully account for, including the behavior of light near massive objects.

A universe in motion

Gravity drives the formation of stars, planets, and galaxies. Without it, matter would not gather into the structures that make up the observable universe.

By studying gravity, physicists gain insight into both the largest cosmic structures and the fundamental nature of reality.