SpacetimeCurvature - crowlogic/arb4j GitHub Wiki

Lastly, SpaceTime curvature is an innate property of space itself, according to Einstein's General Theory of Relativity. Masses act on space by giving it curvature, and space acts back on masses by having them travel in its curved shape. The phenomenon of masses traveling in straight lines in a curved spacetime is known as gravity. The curved trajectory of a satellite in orbit is really a straight line in a curved space. A space devoid of masses still has a shape (it still has Einstein's metric field). That shape can even be curved, even without any masses, according to the equations. There is no way to suck gravity or block gravity out of a region of space because gravity is just the shape of space itself. As a result, even the most empty of physical vacuums will always have a curvature field.