The galaxy was rotating, turning more rapidly in the center than at the edge, as if stirred by a cosmic spoon.
Sometime ago cosmologist started making measurements of how galaxies rotated and they discovered an interesting problem.
The reconnaissance outrigger hung motionless as the galaxy rotated around them.
She argued that galaxies might be rotating around unknown centres, rather than simply moving outwards, as suggested by the Big Bang theory at that time.
While the Hubble image suggested the galaxy's spiral structure however, it didn't conclusively prove that the galaxy rotated like modern day spiral galaxies.
The galaxy is not rotating and the hydrogen is moving about in random clumps.
You just think the entire galaxy rotates around you guys, don't you?
Thus the galaxy does not rotate as a solid body in our local neighborhood, but may in the inner regions of the Galaxy.
However, it seems to be certain that the galaxy does not rotate.
If a galaxy did not rotate, all its stars would fall into the centre.