Saltas and gravity brings it back to Earth. Then everything is clear: gravity behaves in the way Newton thought, as a force that affects and changes the movement. That, at least it seemed until Einstein came.
His general theory of relativity tells us that gravity is not so simple. General relativity provides a framework within which the laws of physics look the same for everyone at all times, regardless of how things are moving. Einstein gravity got it becoming a possession of the Universe and not of the bodies.
general relativity describes gravity as geometry. The fabric of the universe, the four dimensions of space and time, is full of lumps and bumps created by the presence of mass and energy. These curves are inevitable when anything, whether you are you, me, a dash of interstellar dust or a photon of light, trying to travel through the universe in a straight line, actually follows a path that curves to the mass and energy of the bodies that are nearby.
The result of this curvature is what we call gravity. Thus, the gravity is not a body made directly to another, but rather as a body mass makes the surrounding universe. The trouble is that we do not know how fundamental quantum properties of mass, energy and space-time, combine to create this phenomenon.
0 comments:
Post a Comment