All Questions
Tagged with dark-energy spacetime
19
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Can a receding body due to the accelerated spacetime expansion be "rescued"?
Once a body "crosses" the limit where dark energy wins over gravitational forces (Is there a distance from a gravitational source where the influence of gravity and dark energy are balanced ...
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73
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Does spacetime move? With respect to what?
Can spacetime itself rotate along a body, like a black hole? Would it move like a wave?
- 495
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2
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75
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The speed of expansion of space in big freeze
In the case of big freeze, space expansion will be accelerating and there appears to be a lot of different phenomena occurring. However, in the case of big rip, the expansion is super-accelerating so ...
- 13
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Does dark energy cause the creation of spacetime?
The universe is expanding, in theory because of 'dark energy'. Does this mean that this dark energy is causing an increase in the amount of spacetime? I.e., does dark energy cause the creation of ...
- 1,011
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Will we see more or fewer galaxies because of accelerating space expansion?
I have read this question:
The short answer to this is: We see less stars with time, due to the fact that cosmic expansion is accelerating. Although what we really see at the relevant distances are ...
- 29k
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112
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Extracting energy from dark energy using springs
So would it be possible to in theory use really giant springs to extract energy from dark energy? So let's say this spring is located outside the local group where dark energy overcomes gravity. So we ...
- 1,544
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3
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340
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Why should dark matter and dark energy inherently require theoretical modification?
What we know more or less directly about both dark matter and dark energy is their spacetime curvature, and attempts to detect corresponding particles have thus far come up short as far as I've read. ...
- 2,475
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Negative mass as a property of space-time [closed]
What if negative mass is a property of space-time itself? We know that dark energy works against gravity and is currently expanding universe, while this expansion is increasing. Can this be because ...
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Assuming the big rip scenario is possible, what happens exactly at $t=t_{rip}$? Is spacetime really ripped?
I want to start by prefacing a scenario. Say equation of state is $w<-1$ and we live in a phantom dark energy dominated universe. This means in a finite time the cosmological scale factor reaches ...
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43
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Gravity against dark energy
If inflation of space makes stars and galaxies move apart from each other and gravity does the oposite, what happen to clusters of galaxies that aten't so close to get no effect of dark energy but ...
- 2,255
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99
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Volume of dark energy in space [duplicate]
As I understand it, Dark Energy is believed to reside in empty space. As the Universe exapnds, more empty space exists inside the Universe and so the small energy per unit of empty space adds up to a ...
- 101
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Could dark energy and gravity be explained as same phenomenon?
I have watched VSouce video on gravity. The idea is that gravity pulling it is just lots of mass bending space-time, and natural direction of movement becomes moving towards the mass, and since we ...
- 1,125
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Isn't A Singularity Inevitable Given Infinite Time?
I am not a physicist but this is a question I've been trying to find the answer to for years and no answer I've been given has satisfied me.
It's my understanding that gravity affects all matter all ...
- 123
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The Space Between Us [duplicate]
We are told the universe is expanding at anything between 68 and 73km per second, per megaparsec (depending on the places you look) - so by association, the space between us and anything else out ...
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Do dark flow findings suggest we're moving towards distant gravitational anomaly?
The (somewhat) recent paper "Probing the Dark Flow signal in WMAP 9 yr and PLANCK cosmic microwave background maps" (submitted in 2014) by a team lead by the researchers at NASA's Goddard Space Flight ...
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