What Is Gravity

We're all familiar with gravity as the reason objects fall, but there's much, much more to gravity than that. Gravity is a long range attractive force between all objects with mass. It's what keeps us for falling off the earth, it's what keeps the earth in orbit around the sun, and it's what caused the sun itself to form for and a half billion years ago. It's amazing to think that every mass of object attracts every other in the universe. That means that your dog, the earth, and a black hole in the Andromeda galaxy 2.5 million light years away, are all gravitationally attracted to you, and you to them. In the 17th century, I seek new and discover that the strength of the gravitational force decreases by the square of the distance between two objects. So if your twice as far away, gravity is only one fourth is strong. He also discover that the strength of gravity is proportional to the mass of the objects in question. The more mass of an object, the stronger the gravitational force. That's why we can all feel the earth pulling on us, but don't really notice the pull of the moon. The smaller and farther away. The moon's gravity is strong enough to cause the tides, though. And when I said earlier, the gravity is an attraction between objects with mass, I lied. I met objects with energy, because in addition to massive objects, gravity also attracts light and other massless, but energetic particles, so that a photon of light can be bent slightly passing the sun, or trapped completely by a black hole. Now do you understand the gravity of the situation?