Hydrostatic equilibrium

Hydrostatic equilibrium is a special balance that helps things stay still. It happens when forces like gravity are balanced by pressure. This balance keeps fluids, like water, from moving too much.

On Earth, this balance stops the air from the atmosphere of Earth from squeezing together or floating away into outer space. This is why our sky looks the way it does.

In space, this balance helps stars and planets look round. When a planet or star is in balance, it usually spins and stays shaped like a ball. This idea helps scientists learn about dwarf planets and other objects in our Solar System.

Hydrostatic equilibrium is important in astrophysics and helps us understand how fluids behave when they are still or moving slowly. It is a key idea in studying how stars and planets form and change shape.