SapphireSpire

General relativity describes gravity as a curve in space-time. In a curved space-time, an object moving in a straight line and at constant speed will, in normal space, appear to accelerate along a curved path. So curved space-time is equivalent to the accelerated shrinking of normal space over time. How then can an object have a constant volume while the space it's in is constantly shrinking? In order for matter to keep it's volume, either: 1. space is flat and gravity is the curving or shrinking of something other than space. ...or 2. all matter is expanding at precisely the same rate as the space around it is shrinking. Last I check, subatomic particles have no volume, they're just points of mass. Therefore the volume of an object is just space and a high concentration of electric fields. If matter is expanding than it's because the electric fields within the atoms and molecules are expanding- meaning they're increasing in scale, not energy.