Acceleration produced by the mutual attraction of two masses, and of magnitude inversely proportional to the square of the distance between the two centers of mass. It is also the force imparted by the earth, moon, or a planet to an object near its surface. (From NASA Thesaurus, 1988)
    

concept

Doctor Zirkel follows Newton's famous steps under the fabled apple tree. Coloured wood engraving.

Mechanics: a machine with pulleys and calibrated dials. Engraving by A. Bell.

Matter & gravity in Newton's physical philosophy / by A.J. Snow.

Centrifugal force and gravitation : a lecture / by John Harris.

An attempt to prove the motion of the earth from observations. Made by Robert Hooke / [Robert Hooke].

Some unrecognized laws of nature : an inquiry into the causes of physical phenomena, with special reference to gravitation / by Ignatius Singer and Lewis H. Berens.

Gravitation

Images

Catalogue

Mechanics: a machine with pulleys and calibrated dials. Engraving by A. Bell.

Matter & gravity in Newton's physical philosophy / by A.J. Snow.

Centrifugal force and gravitation : a lecture / by John Harris.

An attempt to prove the motion of the earth from observations. Made by Robert Hooke / [Robert Hooke].

Some unrecognized laws of nature : an inquiry into the causes of physical phenomena, with special reference to gravitation / by Ignatius Singer and Lewis H. Berens.