"Gravity is a fundamental interaction which causes mutual attraction between all things that have mass."
Describes the force that attracts objects to one another.
Newton's Law of Gravitation: A fundamental law that explains how two objects in the universe attract each other with a force that is proportional to their masses and inversely proportional to the distance between them.
Gravitational Field: A measurable force field that surrounds any object with mass and extends towards infinity, causing other masses to experience an attractive force.
Kepler's Laws of Planetary Motion: Three empirical laws that describe the motion of planets around the Sun, based on the premise of gravitational attraction.
Universal Law of Gravitation: A generalization of Newton's Law of Gravitation that describes the gravitational attraction between any two masses in the universe.
Geodesics: Curved paths in spacetime that are followed by objects under the influence of gravity, such as planets orbiting a star or comets passing near a black hole.
Escape Velocity: The minimum speed required for an object to overcome the gravitational attraction of a massive object and break free from its orbit.
Black Holes: Regions in spacetime where matter is so densely packed that it creates a gravitational field so strong that not even light can escape from it.
Gravitational Waves: Ripples in the fabric of spacetime that propagate outward from any accelerating mass, such as colliding black holes or merging neutron stars.
Theorems of Newtonian Gravity: A set of mathematical theorems that allow us to analyze the behavior of gravitational fields in various scenarios, such as near a point mass or along a line of masses.
Lagrangian Formulation of Gravity: A mathematical framework that describes the motion of particles or systems under gravitational influence, based on the principles of least action and the Lagrangian function.
"Gravity is, by far, the weakest of the four fundamental interactions."
"Gravity has no significant influence at the level of subatomic particles."
"Gravity is the most significant interaction between objects at the macroscopic scale, and it determines the motion of planets, stars, galaxies, and even light."
"On Earth, gravity gives weight to physical objects."
"The Moon's gravity is responsible for sublunar tides in the oceans."
"Gravity also has many important biological functions, helping to guide the growth of plants through the process of gravitropism and influencing the circulation of fluids in multicellular organisms."
"The gravitational attraction between the original gaseous matter in the universe caused it to coalesce and form stars which eventually condensed into galaxies, so gravity is responsible for many of the large-scale structures in the universe."
"Gravity has an infinite range, although its effects become weaker as objects get farther away."
"The general theory of relativity describes gravity not as a force, but as the curvature of spacetime, caused by the uneven distribution of mass, and causing masses to move along geodesic lines."
"The most extreme example of this curvature of spacetime is a black hole, from which nothing—not even light—can escape once past the black hole's event horizon."
"Newton's law of universal gravitation describes gravity as a force causing any two bodies to be attracted toward each other, with magnitude proportional to the product of their masses and inversely proportional to the square of the distance between them."
"Current models of particle physics imply that the earliest instance of gravity in the universe, possibly in the form of quantum gravity, supergravity or a gravitational singularity, along with ordinary space and time, developed during the Planck epoch."
"The earliest instance of gravity in the universe developed during the Planck epoch (up to 10−43 seconds after the birth of the universe)."
"Scientists are currently working to develop a theory of gravity consistent with quantum mechanics, a quantum gravity theory."
"A unified theory of gravity would allow gravity to be united in a common mathematical framework (a theory of everything) with the other three fundamental interactions of physics."
"Gravity is a force causing any two bodies to be attracted toward each other, with magnitude proportional to the product of their masses."
"The strength of gravity is inversely proportional to the square of the distance between the objects."
"The corresponding antipodal tide is caused by the inertia of the Earth and Moon orbiting one another."
"Gravity is a fundamental interaction which causes mutual attraction between all things that have mass."