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0 thoughts on “How do Spiral Galaxies Get their Arms?”
If you start with a static gas cloud that gradually collapses under gravity, (Hydrogen being the basic building block of all matter, I would postulate), the center of gravity will become more dense and as it does it will have an asymmetrical gravitational effect on the surrounding particles.
This asymmetry or imbalance will cause a galactically unique, directional turning moment or spin to occur at ever greater speed as more matter adds to it, so the initial creation of the arms is a result of the influence of the rotating center on the outer regions of the relatively static gas or dust cloud.
Even if the cloud is fairly evenly distributed, the faster spinning center will attract areas of higher and lower density of matter as it’s major gravitational waves pass through and this will cause a pulsing or non-regular pull on the cloud, ultimately inducing areas of higher and lower density particles or mass objects, i.e. ‘Arms’.
They may be of varying width and length but as time passes, the forces will tend to even out and become regular, as all matter seeks the path of least resistance.
For example, the faster you spin a pizza base, the larger and thinner it gets but in this case, it’s not caused by centrifugal force at this stage of galactic formation. Maybe the particles were first sprayed out of a black hole as gamma rays that collapsed back into a disc of hydrogen atoms, which then collapsed into gas and dust?
The rotating galactic center is pulling the entire galaxy down the plug hole of it’s black hole, (or eventual black hole), as it collapses under it’s own gravity, if it gets dense enough from swallowing up enough matter.
The spiral arms then, are the end result of a balancing act between the forces pulling them in to the centre and the drag of inertia on the slower moving dust or gas at the outer edge or galactic circumference, which will ultimately be pulled right to the center itself.
The Spiral Arm backward curve is simply a result of the rotational speed differential between the faster spinning center and the slower spinning outer portion, so it’s winding itself up like a clock spring.
The Sun’s equator does this every 11 years apparently and releases it’s tension in solar flares and magnetic storms.
If you start with a static gas cloud that gradually collapses under gravity, (Hydrogen being the basic building block of all matter, I would postulate), the center of gravity will become more dense and as it does it will have an asymmetrical gravitational effect on the surrounding particles.
This asymmetry or imbalance will cause a galactically unique, directional turning moment or spin to occur at ever greater speed as more matter adds to it, so the initial creation of the arms is a result of the influence of the rotating center on the outer regions of the relatively static gas or dust cloud.
Even if the cloud is fairly evenly distributed, the faster spinning center will attract areas of higher and lower density of matter as it’s major gravitational waves pass through and this will cause a pulsing or non-regular pull on the cloud, ultimately inducing areas of higher and lower density particles or mass objects, i.e. ‘Arms’.
They may be of varying width and length but as time passes, the forces will tend to even out and become regular, as all matter seeks the path of least resistance.
For example, the faster you spin a pizza base, the larger and thinner it gets but in this case, it’s not caused by centrifugal force at this stage of galactic formation. Maybe the particles were first sprayed out of a black hole as gamma rays that collapsed back into a disc of hydrogen atoms, which then collapsed into gas and dust?
The rotating galactic center is pulling the entire galaxy down the plug hole of it’s black hole, (or eventual black hole), as it collapses under it’s own gravity, if it gets dense enough from swallowing up enough matter.
The spiral arms then, are the end result of a balancing act between the forces pulling them in to the centre and the drag of inertia on the slower moving dust or gas at the outer edge or galactic circumference, which will ultimately be pulled right to the center itself.
The Spiral Arm backward curve is simply a result of the rotational speed differential between the faster spinning center and the slower spinning outer portion, so it’s winding itself up like a clock spring.
The Sun’s equator does this every 11 years apparently and releases it’s tension in solar flares and magnetic storms.