Speed of light: Escape velocity from universe?

[ar81]

Universe is expanding, but galaxies are not. If galaxies were orbiting like ships, objects that are more distant would get away faster than closer objects above or below your ship. So there is no need of dark matter to explain that variation in velocity and probably universe would not be flat.

So I came to the crazy idea that galaxies could be orbiting something, and that speed of light could be an escape velocity from our universe.

What do you think?

 

[DarkEnergy]

It's a very interesting idea, but if they were orbiting the center of the universe we would most likely be able to see a general trend of the movements of the galaxies and infer that, right? So far, only close galaxies like Andromeda have been detected as moving toward us. Shouldn't we be able to detect more galaxies that are catching up to ours in their orbits (closer to the center) with blue-shift, etc?

 

[tblaxland]

Universe is expanding, but galaxies are not. If galaxies were orbiting like ships, objects that are more distant would get away faster than closer objects above or below your ship. So there is no need of dark matter to explain that variation in velocity and probably universe would not be flat.

I think you need to read up on dark matter more. It is not used to explain the difference in velocity between distant objects (eg, galaxies). It is used, amongst other things to help explain how galaxies can rotate so fast about their centres given the observable mass is so low (http://en.wikipedia.org/wiki/Galaxy_rotation_problem).

If you are thinking of dark energy instead, it is also not used to explain the difference in velocity between distant objects, but rather to explain that the velocity is increasing. Your hypothesis fails to address that.

 

[ar81]

I think you need to read up on dark matter more. It is not used to explain the difference in velocity between distant objects (eg, galaxies). It is used, amongst other things to help explain how galaxies can rotate so fast about their centres given the observable mass is so low (http://en.wikipedia.org/wiki/Galaxy_rotation_problem).

If you are thinking of dark energy instead, it is also not used to explain the difference in velocity between distant objects, but rather to explain that the velocity is increasing. Your hypothesis fails to address that.

Velocity is increasing... probably it goes towards periapsis...
It was just a crazy idea I had.

---------- Post added at 03:58 ---------- Previous post was at 03:57 ----------

So far, only close galaxies like Andromeda have been detected as moving toward us. Shouldn't we be able to detect more galaxies that are catching up to ours in their orbits (closer to the center) with blue-shift, etc?

It is preparing for docking our galaxy...:lol:

 

[RisingFury]

No... this is just flat out wrong.

 

[garyw]

Especially as at the start of the universe matter was moving away at faster than the speed of light. Then physics got involved and set up a whole bunch of rules....

 

[Kozak]

What do you think?

That someone needs to either cut down on coffee, or begin make acquaintances amongst science freaks.

 

[ar81]

No... this is just flat out wrong.

Yes. I was just kidding.:speakcool:

---------- Post added at 02:12 ---------- Previous post was at 02:11 ----------

Especially as at the start of the universe matter was moving away at faster than the speed of light. Then physics got involved and set up a whole bunch of rules....

The universe was booted in the big bang, and the rules for the universe videogame OS were loaded as the ini and config files were loaded.:lol: