The question doesn't make any sense. In order for the question to have an answer, you need to define "energy." For ordinary situations, you can define energy as "that thing that I measure which is conserved when I do certain things". When you accelerate something, potential energy turns into kinetic energy and you can define a number that stays constant.I am asking about the energy needed to cause the acceleration of the expansion.
I am asking about the energy needed to cause the acceleration of the expansion.
Hmm. Would there even need to be an expenditure of energy? Or just a force? It isn't that objects are getting pushed away from each other, gaining velocity in space, but that space is expanding in between them.
What is the difference between objects gaining separation in space, and space expanding between objects?
For one, an object cannot exceed the speed of light as measured by traveling through local space. (Non-expanding space around massive objects) However, two galaxies can be receding from one another at a rate greater than the speed of light because neither are traveling through local space anywhere close to that speed. Instead space itself is expanding between them, carrying them apart.
I thought relativity excluded that possibility. Doesn't time skew as the rate of those galaxies separation increases?
No, because they are not traveling through local space at near the speed of light. If we could cut away all the space between us and that galaxy it would be traveling very close to our own speed.
There is no acceleration on the mass itself, the acceleration is only causing the rate of expansion to increase. IE how fast a volume of space expands to a certain size, say double it's current volume.
This is a good discussion about something that confuses a lot of us. I put the quotes all together so I could reflect and maybe add some comments, or others could comment. Actually I hit the wrong key and lost my first set of comments, so I'll just post this and try to return to it later.If the stars aren't actually accelerating away from each other, I can see how there would be no way to calculate the energy needed. That is definitely where my confusion arises. That was the whole basis of the question. Thanks so much for your input! I think you cleared this up.