One of Earth’s Fundamental Global Fields: Gravity
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The glow in this animation depicts one of Earth’s fundamental global fields: gravity. Gravity is the force that draws objects toward each other, like an apple falling from a tree toward the ground. Because of its size and density, Earth has a strong gravitational pull, tugging objects toward its center. This consistent pull has affected the formation and evolution of our planet, including the atmosphere.
The blue lines radiating from Earth represent our planet’s magnetic field.
Credit: NASA/Conceptual Image Lab