Galaxy Formation

I'm wondering if the reason that the outside of the galaxy rotates at the same speed as the inside isn't because the galaxy is a young galaxy.     The reason it is believed that the inside should rotate faster than the outside is because the inner planets of a solar system orbit at a faster speed than the outer planets.  They have to because if they didn't the greater gravity near the sun would cause them to fall closer to the sun.  Would they fall into the sun or reach some asymptotic orbit?  That's for another paper however it makes sense that the inside should rotate faster than the outside.   Like I said if they do not they will fall toward the sun.

Since we are now comparing the Milky Way and other galaxies with the solar system then lets ask ourselves if this is a fair analogy.    It does seem fair because in fact there has been found a solar system that actually looks like a galaxy.   This solar system is thought to be in the early stages of solar system formation.   I would venture to guess it's in it's earliest stage.     I would posit that there are three stages of solar system/galaxy formation:

1. Spiral
1. Galaxies commonly look like this
2. Elliptical 
1. Older galaxies look like this and I would guess early solar systems
3. Ring (Lenticular)
1. There has been found a solar system which looks like this however
2.  I don't think the universe is old enough to have galaxies like this.   Or maybe they are so old they have gone dark.   I would think that the aging process for Galaxies would be much longer since they are so much larger.
4. Orbital: 
1. This is the current stage of most star systems we currently observe.

Stage 3 is Ring and another solar system has been found in this stage.   I guess the premise to this paper is that Galaxies and Solar systems go through similar formations and behave similarly it's just that a galaxies life cycle is several orders of magnitude longer since it's comprised of solar systems.    My main point though is that in the early stages of a solar system I don't think that the same rules apply about orbital velocity as they do in the later stages.   Since the spiral stage is relatively early in the life cycle perhaps orbital velocities haven't been established yet.    Spiral arms suggest that stars aren't really orbiting so much as falling toward the center.  Relative speeds would probably be similar from outside to inside.  Stars are probably moving at very different speeds from one another.      It's only after the slower stars fall further toward the center that they speed up and start orbiting properly.    The outer stars if they are moving too fast they will drift away from the center.  The idea is that it's at the orbital stage that stars on the inside move faster than the stars on the outside.

I guess a good test would be to determine whether the inside of pictured solar system rotates at the same speed as the outside.   I guess this is also evidence for a young rather than steady state universe.   Unless perhaps there are galaxies out there that are in the ring and orbital phases.   They could be so dark we can't see them.    Just because they are dark to us doesn't mean they are dead.   It's possible that the real universe is comprised of the dark matter we can't see.