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
Dark energy is what causes the expansion. We aren’t completely sure what dark energy is. It could be a result of how gravity works or it could be its own new force. Either way from what we can tell is empty space contains dark energy at a constant energy density. This means as new space is created so is new dark energy. This new space and dark energy also contribute to the expansion giving a run away effect that we see today.
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