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  1. Gravity | Definition, Physics, & Facts | Britannica

    Dec 4, 2025 · gravity, in mechanics, the universal force of attraction acting between all bodies of matter. It is by far the weakest known force in nature and thus plays no role in determining the …

  2. Newton’s law of gravitation | Definition, Formula, & Facts | Britannica

    Jan 3, 2026 · How does gravity affect the orbits of planets and moons? How are Newton's and Einstein's theories of gravity different? How do scientists use the law of gravitation to discover …

  3. Gravity - Force, Physics, Theory | Britannica

    Dec 4, 2025 · Gravity - Force, Physics, Theory: The Newtonian theory of gravity is based on an assumed force acting between all pairs of bodies—i.e., an action at a distance.

  4. Gravity - Newton's Law, Universal Force, Mass Attraction | Britannica

    Dec 4, 2025 · Gravity - Newton's Law, Universal Force, Mass Attraction: Newton discovered the relationship between the motion of the Moon and the motion of a body falling freely on Earth.

  5. How Gravity Works on Earth & in the Universe | Britannica

    The reason is gravity, which is the universal force of attraction that acts between all matter. All objects attract one another, but the force of gravity between most objects is so weak that it’s …

  6. gravity - Students | Britannica Kids | Homework Help

    Gravity is a force that objects exert on each other because of their respective masses. An object dropped near Earth’s surface falls to the ground because it is pulled down by the force of …

  7. Physics - Gravitation, Mechanics, Energy | Britannica

    From the long-known equality of the quantity “mass” in Newton’s second law of motion and that in his gravitational law, Einstein was struck by the fact that acceleration can locally annul a …

  8. gravity - Kids | Britannica Kids | Homework Help

    All objects attract other objects because of a force called gravity. Gravity is a pulling force that works across space. That is, objects do not have to touch each other for…

  9. Weight | Gravity, Mass & Force | Britannica

    Because of all the mass in the universe, each point of space has a property called the gravitational field at that point, numerically equal to the acceleration of gravity at that point.

  10. Development of gravitational theory | Britannica

    gravity, Universal force of attraction that acts between all bodies that have mass.