- Gravity: the force of attraction between objects with mass. It affects large scales, such as planets, stars and galaxies. Gravity is responsible for the formation of structures in the universe and the orbit of celestial bodies.
- Electromagnetism: This force acts between electrically charged particles. It is responsible for phenomena such as electricity, magnetism and light. Electromagnetism is fundamental in chemistry and in the formation of atoms and molecules.
- Strong nuclear force: It is the force that holds together the particles in the nucleus of atoms (protons and neutrons). It is one of the most powerful forces, but its effect is limited to very short distances, on the order of 10^-15 meters.
- Weak nuclear force: This force is responsible for certain types of radioactive decay and nuclear processes, such as fusion in the sun. It also acts at very short distances, similar to the strong nuclear force.
These four forces are fundamental to understanding how particles and bodies interact in the universe, and are the basis of modern physics.
But why do they exist? Why are they there? What was the origin of the universe? What was there before the known universe? Does the universe have an end? We have no answers to these questions, this is where you realize how limited we humans are.
If we want to advance as a species, we have to stop looking at the ground (especially now with smartphones) and go back to looking at the sky, there are the answers.
quotingGravity is the fundamental force of the universe, without gravity there would be no rain, no oceans, no planets, no stars, no light, no life.
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