## Gravitational Field

In physics, a **gravitational field** is a model used to explain the influence that a massive body extends into the space around itself, producing a force on another massive body. Thus, a gravitational field is used to explain gravitational phenomena, and is measured in newtons per kilogram (N/kg). In its original concept, gravity was a force between point masses. Following Newton, Laplace attempted to model gravity as some kind of radiation field or fluid, and since the 19th century explanations for gravity have usually been sought in terms of a field model, rather than a point attraction.

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### Some articles on gravitational field:

**Gravitational Field**- Generally Accepted Fundamental Hypothesis

... The detection of

**gravitational**waves bears directly on the question of whether there is any such thing as a "

**gravitational field**," which can act as an independent entity ... … this fundamental

**field**hypothesis has been generally accepted without observational support ... Most scientists believe that the

**gravitational field**and its

**gravitational**waves are the physical interpretations of Einstein's equations of general relativity ...

... Since the

**gravitational field**has zero curl (equivalently, gravity is a conservative force) as mentioned above, it can be written as the gradient of a scalar potential, called the ... In radially symmetric systems, the

**gravitational**potential is a function of only one variable (namely, ), and Poisson's equation becomes (see Del in cylindrical and ...

... problem in general relativity is to determine the motion and

**gravitational field**of two bodies interacting with one another by gravitation, as described by the ... the motion of binary stars around each other, and estimate their gradual loss of energy through

**gravitational**radiation ... General relativity describes the

**gravitational field**by curved space-time the

**field**equations governing this curvature are nonlinear and therefore difficult to solve in a closed form ...

... rewritten using more modern mathematics) the density of mass generates a scalar

**field**, the

**gravitational**potential in joules per kilogram, by Using the Nabla operator for the gradient ... is thought to be exactly correct in the limit of weak

**gravitational fields**and low speeds and all other theories of gravity need to reproduce Newton's theory in ... (1910) tried to modify Newton's theory and to establish a Lorentz invariant

**gravitational**law, in which the speed of gravity is that of light ...

... Counterintuitively, a uniform

**gravitational field**does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force ... When bodies are acted upon by non-

**gravitational**forces, as in a centrifuge, a rotating space station, or within a space ship with rockets firing, a sensation of weight is produced, as the forces ... of weight, in the sense of a state of stress can occur, even if the

**gravitational field**were zero ...

### Famous quotes containing the word field:

“My business is stanching blood and feeding fainting men; my post the open *field* between the bullet and the hospital. I sometimes discuss the application of a compress or a wisp of hay under a broken limb, but not the bearing and merits of a political movement. I make gruel—not speeches; I write letters home for wounded soldiers, not political addresses.”

—Clara Barton (1821–1912)