- Quote: "Gravity is a fundamental interaction which causes mutual attraction between all things that have mass. It is the most significant interaction between objects at the macroscopic scale."
The study of gravitational theories including gravity waves and black holes.
Newton's Law of Universal Gravitation: A fundamental law that describes the attraction between two objects with mass.
Kepler's Laws of Planetary Motion: Three laws that describe the motion of planets around the sun.
Einstein's Theory of General Relativity: A theory that describes gravity as the curvature of spacetime caused by the presence of mass and energy.
Black Holes: Objects with such strong gravitational fields that nothing, not even light, can escape them.
Gravitational Waves: Ripples in spacetime caused by the acceleration of massive objects.
Cosmology: The study of the origin, evolution, and structure of the universe.
Dark Matter: An invisible substance that is thought to make up a significant portion of the universe's mass.
Quantum Gravity: Theoretical attempts to reconcile gravity with the principles of quantum mechanics.
Astrophysics: The study of the physical processes that occur in space.
Gravitational Lensing: The bending of light caused by the curvature of spacetime.
- Quote: "Gravity determines the motion of planets, stars, galaxies, and even light."
- Quote: "On Earth, gravity gives weight to physical objects."
- Quote: "The Moon's gravity is responsible for sublunar tides in the oceans."
- Quote: "Gravity helps to guide the growth of plants through gravitropism and influences the circulation of fluids in multicellular organisms."
- Quote: "The gravitational attraction between the original gaseous matter in the universe caused it to coalesce and form stars which eventually condensed into galaxies."
- Quote: "Gravity has an infinite range, although its effects become weaker as objects get farther away."
- Quote: "Gravity is most accurately described by the general theory of relativity, which describes gravity not as a force, but as the curvature of spacetime caused by the uneven distribution of mass."
- Quote: "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."
- Quote: "Gravity is well approximated by Newton's law of universal gravitation, which describes it 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."
- Quote: "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..."
- Quote: "During the Planck epoch (up to 10−43 seconds after the birth of the universe)..."
- Quote: "Scientists are currently working to develop a theory of gravity consistent with quantum mechanics, a quantum gravity theory..."
- Quote: "A quantum gravity theory would allow gravity to be united in a common mathematical framework (a theory of everything) with the other three fundamental interactions of physics."
- Quote: "Gravity is, by far, the weakest of the four fundamental interactions..."
- Quote: "Gravity is approximately 1038 times weaker than the strong interaction."
- Quote: "Gravity is approximately 1036 times weaker than the electromagnetic force."
- Quote: "Gravity is approximately 1029 times weaker than the weak interaction."
- Quote: "Gravity is responsible for many of the large-scale structures in the universe."
- Quote: "Gravity (from Latin gravitas 'weight')."