Introduction to Gravity 
Gravity is the force of nature attracts all object in the universe to all other objects in the universe. The same force that keeps us on the Earth, keeps the moon orbiting the Earth. Gravity main large scale binding force of the universe.The theory of Gravity was first published by Sir Isaac Newton in 1687.
More than any other men these three were responsible for developing our understanding of gravity. Others made contributions but these three are responsible for main breakthroughs. The following video provides an introduction to this force which we are all familiar with but yet it still holds mysteries to be solved. The Law of Universal Gravitation as Newton's theory of gravity is called can be summed up in the simple Formula. F = force In simple English this means that the strength of gravity decreases by the square of the distance between the two objects increases as shown in the following graph. This graph represents the general case and not a specific situation. Newton's Law of Universal Gravitation is sufficiently accurate to be used in calculating space craft flight paths. Despite this fact is only a very close approximation of how gravity really works. It is highly accurate in most circumstances but yet it is still just an approximation. 
Aristotle 
Galileo Galilee 
Johannes Kepler 

Sir Isaac Newton 
Albert Einstein 
Basic Concept 

Gravity in action 

Expansions Gravity 
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