"Everything is made of atoms. That is the key hypothesis. The most important hypothesis in all of biology, for example, is that everything that animals do, atoms do. In other words, there is nothing that living things do that cannot be understood from the point of view that they are made of atoms acting according to the laws of physics." Six Easy Pieces (p.20)
We, and virtually all mass in the universe is made of atoms that gravitationally attract or repel; this is the Law of Attraction in Action! It almost seems as if the universe is a gigantic atom of mostly empty space, and we are the same.
As the video shows, attraction is based on what the element IS, not solely its mass. The same can be said about any other gravitation that occurs, like with Earth that attracts star power for living beings on our planet. The sun gives us heat, dry, light, bodily tans, growth of food and flora; plus so much more! Our moon is another celestial body that serves the ebb and flow of water. It's not the size or mass of our sun, moon, or planet, per se that constitutes gravitation, but it's the relationships we have with the entire solar system neighborhood and everything or everyone.
Elements (e.g. Hydrogen and Oxygen = H2O), are said to have a covalent bond or strong nuclear force of attraction that brings atoms together. However, there aren't different laws for molecules, planets, flora, fauna, and others for people; its Universal Gravitation (G Force) as postulated by Newton, Einstein, Joie, and others. Gravity appears to be the cosmic glue of ALL attraction - from the smallest atomic scale, to the grandest celestial coalescence.
"If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words?
I believe it is the atomic hypothesis that all things are made of atoms - little particles that that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling..." Richard Feynman