Loading…
Loading contentLoading…
Loading contentThe universal attraction between masses that governs the motion of everything from apples to galaxies.
Newton described gravity as a force between masses; Einstein reframed it as the curvature of spacetime by mass and energy. On cosmic scales gravity shapes the growth of structure and the dynamics of the Universe as a whole.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.