The term "gravity" implies to many the notion of weight. Since antiquity, objects have been observed to "fall down" to the ground, and it therefore seemed obvious to associate gravity with Earth itself. Earth pulls all...

Geophysicists utilize slight variations in gravitational force to characterize the mass of subsurface features. Particularly useful in petroleum exploration, subtle gravitational field differences can help identify solid subsurface plutonic bodies or...

What goes up, must come down; that's a simple statement for a very complex force that has been a puzzle for millennia. The ancient Greeks had a simple explanation for gravity: the elements (earth, air, fire, water) always sought their natural place....

Gravity is the force of attraction between any two objects in the universe with mass. Although it is much weaker than any of the other fundamental forces (electromagnetism, the weak force, and the strong force) and is neglected in the interactions of...

The gravitational force is one of fundamental forces in nature discovered to govern the interaction of material objects. The other three fundamental forces are the electromagnetic force, the strong nuclear force, and the weak nuclear force (which is...

Gravity is a universal attractive force that is directly related to the mass of an object. One mass will always attract another mass, and the size of the attraction is related to the size of the masses involved. Gravity is a comparatively weak force...

The gravitational field is a measure of the gravitational force present in a region of space due to material objects. A quantitative description of the gravitational field is developed in the following way: take the force felt by a test body and divide...

Universal force of attraction that acts between all bodies that have mass. Though it is the weakest of the four known forces, it shapes the structure and evolution of stars, galaxies, and the entire universe. The laws of gravity describe the...

Gravitation is a natural phenomenon by which all objects with mass attract each other. In everyday life, gravitation is most commonly thought of as the agency that gives objects weight. It is responsible for keeping the Earth and the other planets in...