Vacuum decay (or sudden phase change) is not related directly to accelerated expansion of the universe (at least to our current knowledge) which is being driven by dark energy.

In one situation, expansion simply keeps on going, giving us the Big Freeze.

In other situations, dark energy at some point becomes attractive and the universe starts to contract and ends up in a Big Bounce.

Vacuum decay is different. It is a sudden shift of the lowest level of energy of the Higgs field. We wouldn't see it coming at all.

Well it was only recently observed, and I don't think there's anything but a name - dark energy. But a name is not an explanation - it may as well be named Bob.

Expanding Space was "Observed", Dark Energy is dark for a reason.

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Yes but we dont know what Bob is, but we assume Bob exist.

Dark energy is the name of the cause of the expanding space. What it actually is isn’t known.

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Hello u/EdMaxwellred, your submission "Expanding space is observed in the Universe, the term "Expanding Space" seems a perfunctory label, it must be an enormous amount of energy to accelerate the Universe. What is the science behind it?" has been removed from r/space because:

• Please link directly, do not put a link in a self pot

Please read the rules in the sidebar and check r/space for duplicate submissions before posting. If you have any questions about this removal please message the r/space moderators. Thank you.

>Please link directly, do not put a link in a self pot

What exactly does that mean???

So what is the specific violation?