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The spiral arm only contributes a small portion of the galaxy's mass. The visible arm is really just a wave of hydroden being compressed to form very bright, very short-lived stars. Most of the mass is in the spheroid halo.
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Well at least
there is some evidence of very large interstellar currents and also something that was pre-dicted instead of post-dicted“It is no use trying to 'see through' first principles. If you see through everything, then everything is transparent. But a wholly transparent world is an invisible world. To 'see through' all things is the same as not to see.”
― C.S. Lewis, The Abolition of ManComment
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according to some astronomers, there are black holes or super black holes at the center of of all galaxiesanti steam and proud of it
CDO ....its OCD in alpha order like it should beComment
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