"Gravity is a fundamental interaction which causes mutual attraction between all things that have mass."
The force of attraction between two objects with mass.
Newton's Laws of Motion: These are foundational principles that explain how objects in motion interact with one another.
Universal Gravitation: This concept describes the force of attraction between two objects due to their mass and distance from one another.
Mass and Weight: Mass is the amount of matter in an object, while weight is the force of gravity acting on that object.
Kepler's Laws of Planetary Motion: These laws describe the behavior of celestial objects in orbit around one another.
Escape Velocity: This is the minimum speed required for an object to escape the gravitational pull of a planet or other celestial body.
Schwarzschild Radius: This is the radius at which an object would need to be compressed in order to become a black hole.
Curved Spacetime: This concept describes how the presence of mass and energy can warp the fabric of space and time.
Gravitational Waves: These are ripples in the fabric of spacetime caused by the motion of massive objects, such as black holes or neutron stars.
Dark Matter: This is a mysterious substance that makes up a significant amount of the universe's mass, but does not emit or absorb light.
Gravitational Lensing: This phenomenon occurs when the gravitational pull of a massive object bends the path of light passing nearby.
Gravitational Time Dilation: This concept describes how time passes differently in areas with stronger or weaker gravity.
General Relativity: This theory explains gravity as the curvature of spacetime due to the presence of mass and energy.
Planetary Formation: This is how celestial bodies, such as planets, are formed through the accumulation of dust and gas.
Quantum Gravity: This is the field of study that attempts to reconcile the principles of quantum mechanics with the theory of general relativity.
Gravitational Collapse: This is the process by which a massive object becomes compacted to a point or region of space, potentially forming a black hole.
"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."