What if the Universe is not expanding at all?
Maybe, it is the Dark Energy that is expanding, and slowly consuming our whole Universe.
We know that Universe is expanding, we have observed that, so it's not any philosophical thing.
The "observable" Universe is 92-93 billion light years across, is is expanding and accelerating much faster than the speed of light itself.
As the Universe expands, light coming from far stars, soon, wouldn't be able to reach us. So there would be a time in the future "we" wouldn't be able to see anything in the sky, just darkness, well "we" wouldn't be there at that point in the future of course.
That could mean, as the Universe expands, "Darkness" expands - Dark Energy.
That's an interesting hypothesis. Dark energy is an unknown form of energy that affects the universe on the largest scales. It is believed to be responsible for the accelerated expansion of the universe. The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand "into" anything and does not require space to exist "outside" it.
However, there is no conclusive evidence that dark energy is expanding or consuming the universe. There are different theories and models that try to explain the nature and origin of dark energy, such as the cosmological constant, scalar fields, modified gravity, etc. None of them have been proven or ruled out yet. The mystery of dark energy is one of the biggest challenges in cosmology and physics today.
Lyudmil Antonov,
there is no dark energy. The original paper claiming it has problems as I discussed in my third book (Born:A universe III, in my profile). Later experiments do not see an accelerating universe.
We definitely have seen effects of Dark Energy (If I'm correct), and some of us believe that it is responsible for accelerating the expansion of the Universe.
Recently, I came across a theory, that Dark Energy could be the gravity from a different Universe that is affecting our Universe. This is just a theory.
We don't know, and maybe we can never know, what lies beyond our Universe, or beyond the "observable Universe", we are not sure about our Universe, we can never be certain what lies beyond our Universe.
That is why this field is really interesting, There is no limit. You can think beyond and on.
@Hans Gennow,
Did you mean that the Universe is expanding but it is not accelerating?
Is it just expanding constantly?
Siddharth Rana,
no acceleration, just expanding. However I found that it will slow down by time. In fact, it will start to retract after the order of 10^^100 years. (Not a very exact number.)
The universe will shrink to the beginning and the process might start all over.
@Hans Gennow
Yes that's my theory.
The Universe will expand (dis-orderness will increases) and soon after some point it'll start shrinking to the singularity, the same point from where it expanded earlier. And this whole process will repeat.
And this could also mean, (Refer to the Figure) the expansion part is a Black Hole and the latter part is a White Hole, this combine makes a Wormhole.
(Attached figure is a rough illustration of what I mean.)
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