Gravity is a key force shaping the cosmos from "summary" of La vita del cosmo by Lee Smolin
Gravity, the force that pulls objects toward each other, is one of the fundamental forces in the universe. It is the force that keeps planets in orbit around stars, moons in orbit around planets, and objects on Earth firmly planted on the ground. Without gravity, the cosmos as we know it would not exist. Gravity shapes the cosmos in profound ways. It is responsible for the formation of galaxies, stars, and planets. In the early universe, gravity played a crucial role in the clumping together of matter, eventually leading to the formation of structures on a cosmic scale. Without the force of gravity, these structures would not have been able to come into being. On a smaller scale, gravity governs the motion of objects in space. It dictates the trajectories of comets, asteroids, and spacecraft, determining where they go and how they m...
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