# dark-energy's questions - English 1answer

311 dark-energy questions.

### Could aliens harness stars to keep ahead of expanding universe?

0 answers, 19 views cosmology dark-energy
In this paper, Dan Hooper of the Fermi National Accelerator Laboratory proposes that advanced aliens might gather stars from other galaxies as a hedge against the dark energy powered expansion of the ...

### -2 Could dark energy and gravity be explained as same phenomenon? [duplicate]

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 ...

### Dark energy and virtual particles

If space time is accelerating away from itself everywhere due to dark energy, could this acceleration be the cause of virtual particles, essentially Unruh radiation?

### Why can't the Higgs vacuum energy clump to galaxies and act as dark matter (instead of dark energy)? [closed]

The Higgs field has a nonzero vacuum expectation value which contributes to the energy density of the Universe. Energies contribute to the curvature of spacetime and affected by gravitational ...

### 2 Does the expansion of the universe affect its shape?

1 answers, 43 views cosmology space-expansion dark-energy
This may be a very simple question, yet I cannot find an answer that satisfies me. I have read (and please correct me if I am wrong) that the shape of the universe depends on its density. If it has ...

### -1 Is dark energy the same as graviton loop corrections? [closed]

According to a lecture by Professor Susskind that I watched. Dark energy is the energy of the vacuum caused by quantum fluctuations or particle/ant-particle pairs being created and destroyed. ...

### 3 How can cosmological constant serve two opposite purposes?

Einstein used the cosmological constant to prevent expansion which he regarded as his greatest blunder. On the other hand, we are saying that the cosmological constant can cause the space expansion to ...

### 1 Was the expansion of the universe ever decelerating?

The Universe has always been expanding since the big bang. Today the expansion is accelerating. Has there been any point in time when the expansion of the universe was decelerating? How do we know ...

### Can “dark energy” change a mass of a barionic object?

0 answers, 26 views energy mass dark-energy
Energy may affect a mass of an object. Can dark energy have an impact on a mass of an object? This question (probably unusual) is prompted by observations of a change in mass (not weight) of large ...

### 4 Will a closed universe with dark energy still collapse into a big crunch or will it expand forever?

In a closed universe without dark energy, it departs rapidly from flatness and become more curved over time. The expansion of the universe eventually stops and starts to collapses into a big crunch. ...

### 2 Could Dark Energy just be particles with negative mass?

Title speaks for itself. Dark matter: We see extra attractive force, and we posit that there are particles which create such a force, and use the measure of that force to guess their locations. Dark ...

### 1 Hawking Radiation and Dark Energy

Imagine you're inside a black hole event horizon. The curvature of spacetime is such that the direction towards the singularity becomes timelike, as reverse movement becomes literally impossible. How ...

### Could dark matter/dark energy turn out to be tachyonic?

Today, I was watching the Inexplicable Universe with Neil deGrasse Tyson. He spoke about Dark Matter, Dark Energy, and then he spoke about Tachyons. Naively, I thought what if the reason we can't ...

### What is the theoretical relation between string theory and the multiverse theory?

I understand that the Nobel-winning discovery of the accelerated expansion of the universe 7 years ago started the speculation of dark matter and dark energy. I saw in a TED conference by Brian Greene ...