I recently learned that the expansion of the universe means that everything is moving further away from everything else as new spacetime is fabricated between objects (rather than the universe’s edges expanding).
What I can’t find, is the process by which this expansion is happening. If the vacuum of space is considered spacetime, then spacetime can be devoid of all energy. So how does it get made if energy cannot be lost in its creation?
In: Physics
Spacetime is not devoid of energy.
It is unproven why we are experiencing the current rapidity of expansion. We know for sure that it was not caused (in whole) by the rapid expansion that occurred near the beginning of the universe.
Particles and potential particles can come and go in spacetime without violating the conservation of charge as long as they are in equilibrium.
Try not to think of the universe in Euclidian terms (there are no edges.) Imagine, instead, a balloon; it expands in all directions. You don’t necessarily have to blow into it to get it to expand; just heat it up.
Get Hawking’s “The Universe in a Nutshell” a lot of knowledge, light on the math (but sound.)
Latest Answers