Dark energy is the unknown form of energy that drives the acceleration of the universe's expansion.
Questions tagged [dark-energy]
573 questions
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What type of energy is Dark Energy?
What type of energy is Dark Energy? Just as the title says. Is it kinetic/potential or some other type?
Lenol
- 735
2
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1 answer
Dark Energy and Conservation of Momentum
IF dark energy was not perfectly evenly distributed(as some theories suggest), in other words if some cubic centimeter had a very small difference from another cubic centimeter, would that imply that spatial translation is not invariant, and hence…
jeromefroe
- 121
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Dark-energy sources and respective implications
Firstly, I want this to be a very layman/simple level. According to Sean Carroll, we have certain possibilities for where dark-energy comes from:
http://www.youtube.com/watch?v=v6o2bUPdxV0
Including
A modification of general relativity
Vacuum…
Alan Rominger
- 21,047
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2 answers
In a Big Crunch, would there be more mass than at the Big Bang?
I found multiple questions where it is stated that dark energy increases as the universe expands. Assuming a big crunch scenario, will this dark energy "go away" again as the size of the universe decreases again, or will there be more energy (=mass)…
kutschkem
- 745
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vote
1 answer
Could there be a small-scale observation of dark energy?
The amount of dark energy in the universe is pinned down fairly precisely by fluctuations in the cosmic microwave background, if I understand correctly. So in that sense there's very good evidence of its existence.
What I'm wondering is, could there…
Jamie Hall
- 13
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2 answers
Could dark energy, in theory, pull whole objects apart?
The not-so-well understood dark energy is cited as the reason for distant galaxies drifting even further away from each other – or, rather, perpetually causing an additional length of empty space proportional to the current distance between the…
miikkas
- 765
0
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1 answer
Does dark energy have mass?
For personal writing purposes, I’ve been researching dark energy, amongst other similar subjects. I’ve found it hard to discern whether or not we have any conclusive answers or generally accepted theories for this question, and would appreciate any…
0
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1 answer
Is it possible that humans have the capability to interact with Dark matter?
Recently, scientists and physicists have been making breakthroughs in dark matter detection. I'm wondering if it's possible for humans to potentially be able to travel deep enough into space to be able to get to the place where dark matter is. I…
0
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1 answer
Dark energy converted to electricity
Possible Duplicate:
Dark Energy saving the world
In theory, dark energy be used to generate electricity. Given its apparent abundance, this could provide rather a lot (perhaps too much) clean energy. Has any research been conducted on this or…
Peter Lawrey
- 153
0
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2 answers
Is existence of cosmic dark energy falsifiable yet?
Is "existence of cosmic dark energy" falsifiable yet? And what about dark matters? Let me rephrase it again(pardon me for my previous poor expression)-
Is there any condition discovered which can be used to determine the "existence of cosmic dark…
Gulshan
- 703
-1
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1 answer
Dark Energy Explanation Found
It's my sincere request to this Physics forum that if i am wrong (which has the least possibility atleast from my side) just reply "wrong" so that i can move on futher.
I know personal theories are not allowed but i am not finding any place to get…
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Is Dark Energy a particle?
Is Dark Energy a particle due to the mass-energy equivalence ($E=mc^2$)? I mean surely something cannot have energy without mass. Hence my question, I've been trying to figure this question out, but have come to the conclusion that Dark Energy is a…
Graham Best
- 134
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Can the cause of the accelerating expansion of the universe be the very nature of the big bang?
Since the universe is expanding in all directions at once, like a loaf of bread dough rising, wouldn't all points further away from any refernce point simply appear to be accelerating? If so, then there is no need for a Dark Energy cause to explain…
Jeff
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