We know what its effects are, and we can give the name “gravity” to the cause of those effects, but we don't know the cause of that cause. ... Gravity is not the force of attraction that makes things fall straight down.

What actually creates gravity?

Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That's what gives you weight. And if you were on a planet with less mass than Earth, you would weigh less than you do here.

Do we know why mass creates gravity?

According to theory, the reason mass is proportional to gravity is because everything with mass emits tiny particles called gravitons. These gravitons are responsible for gravitational attraction. The more mass, the more gravitons. ... Most gravitons exist in a cloud around the object.