the law of universal gravitation is a law explaining the gravitational force of the interaction between objects published by sir isaac newton in 1687 in "principles of natural philosophy". the content of the law is as follows: any two particles attract each other through a force in the direction of the line connecting their centers. the magnitude of this gravitational force is directly proportional to the product of their masses and inversely proportional to the square of their distance. it has nothing to do with the chemical nature or physical state of the two objects and the intervening material. the formula is expressed as: f=g*m1m2/(r*r) (g =6.67×10^-11n·m^2/kg^2).

based on the research of his predecessors (j. kepler, r. hooke, c. wyen, and e. halley), newton relied on his extraordinary mathematical ability to prove that in 1687, he published the law of universal gravitation in "mathematical principles of natural philosophy". the discovery of the law of universal gravitation was one of the greatest achievements of natural science in the 17th century.newton's law of universal gravitation

gravity: f = gm₁m₂/r²

here

g = gravitational constant = 6.6726 x 10^-11N-m²/kg²

m₁ =object1mass

m₂ =object2mass

r = distance between two objects