Gravity -

What Is Gravity? | NASA Space Place – NASA Science for Kids

Gravity: The Universe's Invisible Glue Gravity is the silent architect of our universe. It is the force that keeps your feet on the pavement, anchors the atmosphere to our planet, and choreographs the complex dance of galaxies across billions of light-years. Despite being a constant presence in our lives, gravity remains one of the most mysterious and debated topics in modern physics. The Strength of a "Weakling" Gravity

However, because it has an and only attracts (never repels like magnetism), its effects accumulate. This allows gravity to dominate at the cosmic scale, holding together entire solar systems and warping the very fabric of space and time. Newton vs. Einstein: Two Ways to See the World What Is Gravity