G ravity is a bit of a mystery. It’s not as strong as other forces. It only pulls things and doesn’t push. The strength of gravity is measured by something called the Gravitational constant but figuring out its exact value is tough. What’s interesting is that if the Gravitational constant were a bit weaker, space would have expanded too fast for stars and galaxies to form. On the other hand, if it were a bit stronger, everything might have collapsed in on itself. So, we’re lucky that gravity is just right for our universe to exist the way it does.
Gravity is different from the other fundamental forces like electromagnetism and the strong and weak nuclear forces. These forces are explained by quantum field theory and are transmitted by quantum particles. There’s a hope that gravity might also be explained similarly in the future. we might discover the quantum properties of mass, energy, space, and time that combine to create gravity at its fundamental level.
However, the hypothetical quantum particle thought to transmit gravity called the graviton remains mysterious. Achieving a quantum theory of gravity, represented by the graviton, is a challenging goal and is yet to be realized.