Linked Questions

1
vote
1answer
50 views

Does the expansion of the universe stretch distances in non-radial/angular directions?

At time $t = t_0$ a galaxy is situated at a proper distance $r_0$ and has a proper diameter $D_0$. Setting $a(t_0) = 1$ the proper distance to the galaxy will then of course evolve with the expansion ...
-3
votes
1answer
64 views

Explanation and quantum gravity [closed]

Is spacetime accelerating? Is it accelerating within an acceleration ?Or is it a constant? (are different objects or particles influenced by other rates in spacetime compared to one-another and if ...
0
votes
1answer
54 views

What would prevent two black holes from hitting speed of light in the flowing scenario?

If two super massive black hole are 10 l.y away and completely still relative to one another... They will start moving towards each other due gravity but they will never reach each other due universal ...
1
vote
0answers
45 views

Can the metric expansion of space theoretically be exploited to do work?

Other questions tackle why space doesn't expand matter, and I've read their respective top answers, but I'm interested in something a little different. Let's say I set up two masses that are 1 Mpc ...
2
votes
0answers
35 views

Can expansion of space create energy? [duplicate]

In this question, expansion of space is considered, and it is explained that gravity and electomagnetic forces prevent matter from expanding. The idea I get in my head is something like a weight ...
0
votes
0answers
10 views

Expansion of the Universe (within galaxies) [duplicate]

We know that the universe is expanding. The galaxies are moving far away from each other. But what is happening inside those galaxies or inside the solar systems? Is our Earth moving further away from ...

15 30 50 per page
1
4 5 6 7
8