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
It’s the mysterious and kind of poorly named “Dark Energy”. It was originally a byproduct of Einstein’s GR equations that we thought was just a quirk of the mathematics. Then, Edwin Hubble found that everything was moving away from us, so it turned out there was a physical consequence of it. There’s not much well known about it.
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