# gravitation

## Definitions

• Gravitational pull
• WordNet 3.6
• n gravitation a figurative movement toward some attraction "the gravitation of the middle class to the suburbs"
• n gravitation movement downward resulting from gravitational attraction "irrigation by gravitation rather than by pumps"
• n gravitation (physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface "the more remote the body the less the gravity","the gravitation between two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them","gravitation cannot be held responsible for people falling in love"--Albert Einstein"
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Webster's Revised Unabridged Dictionary
• Interesting fact: Sir Isaac Newton was only 23 years old when he discovered the law of universal gravitation.
• Gravitation (Pysics) That species of attraction or force by which all bodies or particles of matter in the universe tend toward each other; called also attraction of gravitation universal gravitation, and universal gravity. See Attraction, and Weight.
• Gravitation The act of gravitating.
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Century Dictionary and Cyclopedia
• Interesting fact: There is air in space, but very little of it. In fact, it is equivalent to a marble in a box 5 miles wide. Most of the gas is captured by the gravitational pull of other celestial bodies.Thanx M.Lerner
• n gravitation The act of gravitating or tending toward a center of attraction.
• n gravitation That attraction between bodies, or that acceleration of one toward another, of which the fall of heavy bodies to the earth is an instance. See gravity, 1. Gravitation can be neither produced nor destroyed; it acts equally between all pairs of bodies, the acceleration of each body being proportional to the mass of the other; it is neither hindered nor strengthened by any intervening medium; it occupies no time in its transmission; its force is inversely as the square of the distance; and the amount of it is such that a particle distant one centimeter from an attracting gram of matter would by the action of gravitation alone, were no other force present, fall into the center of attraction in 40 minutes and 20 seconds. Inasmuch as the masses of bodies can be measured otherwise than by their weights, namely, by their relative momentums under a given velocity, it follows that the modulus of gravitation, or the amount by which the unit mass attracts a particle at the unit distance, which is invariable, best distinguishes gravitation from every other force. The laws of the attraction of gravitation were demonstrated by Sir Isaac Newton in 1687.
• n gravitation In philology, the tendency of sounds and syllables having little or no stress to become merged in the accented syllable, or to fall away entirely; the absorption of weaker elements.
• n gravitation Figuratively, a prevailing tendency of mental or social forces or activities toward some particular point or result.
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Chambers's Twentieth Century Dictionary
• Interesting fact: You would need to travel at 6.95 miles per second to escape the Earth’s gravitational pull. This is equivalent to traveling from New York to Philadelphia in about twenty seconds.
• n Gravitation act of gravitating: the tendency of all bodies to attract each other
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## Quotations

• James Allen
“No temptation can gravitate to a man unless there is that is his heart which is capable of responding to it”
• Leon Trotsky
“Not believing in force is the same as not believing in gravitation.”
• Albert Einstein
“Gravitation can not be held responsible for people falling in love”
• Terry Eagleton
“It is silly to call fat people gravitationally challenged -- a self-righteous fetishism of language which is no more than a symptom of political frustration.”
• Orison Swett Marden
“Power gravitates to the man who knows how.”
• Tom Stoppard
“Responsibilities gravitate to the person who can shoulder them.”

## Etymology

Webster's Revised Unabridged Dictionary
Cf. F. gravitation. See Gravity
Chambers's Twentieth Century Dictionary
Fr. gravité—L. gravitat-emgravis, heavy.

## Usage

### In literature:

Surely there is an upward law of gravitation as well as a gravitation that pulls things down.
"Little Journeys to the Homes of the Great, Volume 4 (of 14)" by Elbert Hubbard
Then we'll lose speed constantly until we come into Earth's gravitational field and have to brake.
"Rip Foster in Ride the Gray Planet" by Harold Leland Goodwin
The Med Ship was free, in clear space where there was not enough of a gravitational field to hinder overdrive.
"This World Is Taboo" by Murray Leinster
For about five minutes I defied all the laws of gravitation.
"The Story of a Summer" by Cecilia Cleveland
The attraction of gravitation is not supposed to be electricity, and yet here out of its pull upon the water comes this enormous voltage!
"The Breath of Life" by John Burroughs
There was the feel of gravitation, now.
"Operation: Outer Space" by William Fitzgerald Jenkins
Another consequence of the small gravitative power of the moon bears upon the all-important question of atmosphere.
"Other Worlds" by Garrett P. Serviss
The absolute leviation of phlogiston, in contrast with the gravitation of all other forms of matter, discredited that supposed agent.
Under the influence of the gravitative attraction the materials of this realm of vapour inevitably tended to fall in toward the centre.
"Outlines of the Earth's History" by Nathaniel Southgate Shaler
He who has made the grass of the fields to grow, and who makes the earth gravitate toward the sun.
"Voltaire's Philosophical Dictionary" by Voltaire
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### In poetry:

For truth must live with truth, self-sacrifice
Seek out its great allies;
Good must find good by gravitation sure,
And love with love endure.
"Within The Gate" by John Greenleaf Whittier
I AM he that aches with amorous love;
Does the earth gravitate? Does not all matter, aching, attract all
matter?
So the Body of me, to all I meet, or know.
"I Am He That Aches With Love" by Walt Whitman
Men of a thousand shifts and wiles, look here!
See one straightforward conscience put in pawn
To win a world; see the obedient sphere
By bravery's simple gravitation drawn!
"To W.L. Garrison" by James Russell Lowell
But gravitation's law, of course,
As Isaac Newton showed it,
Exerted on the cheese its force,
And elsewhere soon bestowed it.
In fact, there is no need to tell
What happened when to earth it fell.
"The Sycophantic Fox And The Gullible Raven" by Guy Wetmore Carryl

### In news:

For years, rocket scientists were stumped by the challenge of powering a rocket with enough thrust to escape Earth's gravitational pull.
The closer we get to the Fourth of July, the stronger the gravitational pull of the grill.
We tend to gravitate to our favorite places, and so have not seen the coast in its entirety for years.
The Hubble Space Telescope zooms into an exceptional gravitational lens.
It's slightly off topic for a Hemmings Classic Car subject, but I still feel an almost gravitational pull to discuss it here.
Hunt for gravitational waves from black holes set to begin.
An artist's impression of gravitational waves from two orbiting black holes.
On the patio of a restaurant in Malibu, Thomas Steinbeck , Nobel laureate John Steinbeck 's eldest son, is in his favored environment, along the California coastline, which, like his father, he has gravitated to for many years.
Scientists believe they can detect low-frequency gravitational waves created by decaying superstrings.
These locations have been shot hundreds of thousands of times yet we gravitate toward them because of their beauty.
Teens, however, are gravitating to YouTube for music more than any other source, including radio, CDs, and even iTunes, according to Nielsen's Music 360 report.
When regional theaters around the country start to gravitate toward a particular play, it's tempting to play psychologist/sociologist and try to figure out why.
Mission controllers received confirmation today that NASA's Dawn spacecraft has escaped from the gentle gravitational grip of the giant asteroid Vesta.
Common sense dictates there's a reason country-western crooners gravitate to the sparkle of rhinestones but business presenters don't.
When Mauians think of Puerto Rican food, they tend to gravitate towards the pastele.
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### In science:

The gravitational energy-momentum is given by equation of motion of gravitational gauge ﬁeld, it is also a conserved current.
Gauge Theory of Gravity
We can see again that, for matter ﬁeld, its inertial energy-momentum tensor is also different from the gravitational energy-momentum tensor, this difference completely originate from the inﬂuences of gravitational gauge ﬁeld.
Gauge Theory of Gravity
It can be seen that the vector ﬁeld can also directly couple to arbitrary number of gravitational gauge ﬁelds, which is one of the most important properties of gravitational gauge interactions.
Gauge Theory of Gravity
In gravitational gauge theory, the system has local gravitational gauge symmetry.
Gauge Theory of Gravity
But, as we have studied in previous chapters, the inertial energymomentum is not equivalent to the gravitational energy-momentum in gravitational gauge theory.
Gauge Theory of Gravity
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