#gravity__gravitation__gravitational_attraction__gravitationalattraction__gravitational_force__gravitationalforce  the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface; "gravitation cannot be held responsible for people falling in love"--Albert Einstein
  supertype:  attractive_force__attraction  the force by which one object attracts another
  subtype:  solar_gravity__solargravity  the gravity of the sun; "solar gravity creates extreme pressures and temperatures"

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