How did the rotation of galaxies?

[Гера�им]

May be the beginning of the rotation of galaxies due to the expansion of the Universe.When the expansion of the Universe,where there were particles with mass movement speed decreased,it is possible particle with mass appeared compact and and there where there were more paeticles with mass became the site of the future nucleus of the galaxy.The rest of the formed mass in the form of gas clouds following the core and twisted.

[Гера�им]

Let me add a little here.

Believe,that the speed of movement of stars in the outskirts of galaxies is higher than expected due to the presence of dark matter. May be it's not dark matter, and formation of space particles with mass,which give additional impetus to material objects.

[imatfaal]

I don't know if the net angular momentum of the observable universe is zero or not. It might be an interesting question.

 

If over large enough regions you always find that the net ang mom is zero then nothing exterior is needed to explain the motion ie no external torque is needed. But if this is not the case you have to start asking seemingly unanswerable questions - is it just that we are not looking on a large enough scale (ie the observable universe is too small to be isotropic) or what is powerful and hidden enough to exert a net torque on a significant portion of the universe.

[Dr. Funkenstein]

i'm going with the obvious here. A study of a spiral galaxy seem's to suggest that it's rotation is a by product of it's center mass motion. On first glance it seem's to be that the center is the area of some type of vortex, which spirals the movements of all the galaxies remaining matter, in a downward twirl.

 

However closer inspection reveals that it is not really a spiral, but more a orientated polarization pull, from some unknown poles, of the center mass. Thus the center mass resembles more the symbol of the Chinese Yin and Yang, more then a true spiral vortex.They method of the intake of a galaxies matter can not be overlooked. Now inflation of the universe due to the BB, rules out the rotation of a galaxy being due to the BB, since all "particles" of, would then be directional. They all seem to be on a whole, but not in the particular of individual galaxies.

 

Black holes could be a culprit of rotation, but that would then mean that black holes would have poles as mentioned above, of matter attraction. N,S or E.W depending of angle of sight and true intake of material. So our theories on black holes being one giant 360 sucker would be incorrect.

 

Lets say the center mass of the galaxy is either through some unknown force, because of it's make up, is set in motion by BB exclusively. Or this center mass has a property which rotates by the substance of it's mass ie.. gravity, elecmag, etc, in it's entirety.

[Mordred]

I don't know if the net angular momentum of the observable universe is zero or not. It might be an interesting question.

 

If over large enough regions you always find that the net ang mom is zero then nothing exterior is needed to explain the motion ie no external torque is needed. But if this is not the case you have to start asking seemingly unanswerable questions - is it just that we are not looking on a large enough scale (ie the observable universe is too small to be isotropic) or what is powerful and hidden enough to exert a net torque on a significant portion of the universe.

Rotating universe models have been considered and discounted as it's impossible to maintain isotropy regardless of how slow a rotation. No evidence is conclusive enough to counter the cosmological principle.

 

The reasons galaxies spin is the same reason planets and stars spin.

 

During the formation process, plasma state as the plasma forms centers of mass other particles etc start orbitting the higher mass density. This influences the center of mass to start rotating. (According to the conservation of angular momentum laws). As the plasma volume decreases the spin increases.

 

A good analogy place a marble on a trampoline, roll another marble toward but not directly at the first marble. You will see the second marble orbit the first. Now apply that in terms of gravity. Gravity of both objects affect each other. So the motion of one rotating object influences the spin of the larger mass.

 

Google tidal locking for an example of how a moon or planet can affect the spin of the planet or star it is orbitting.

 

Galaxies are more complex, however the reason they rotate is the same.

 

Conservation of angular momentum during its formation.

Edited January 23, 2015 by Mordred

[Гера�им]

Let me add a little here.

Believe,that the speed of movement of stars in the outskirts of galaxies is higher than expected due to the presence of dark matter. May be it's not dark matter, and formation of space particles with mass,which give additional impetus to material objects.

Galaxies move away from each other in the expanding Univere.Since galaxies have huge masses that they move much slower that the space,itself which is likely to end moves with the speed of light.The resulting particles from space with mass as the electron,the proton behave like a vortex or spinning tops it is maybe the result of their slowly move space.Then it is easier to explain the origin of the electric charge of elementary particles and gravity massive bodies.

[jeffellis]

I think it is due to a universe that spins on an axis (much like a black hole).