"Flying Saucers"

                                                   

    

                                                  

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...Rotation around an Axis (Bold as Love, sang Jimi Hendrix) could produce the geometry of an accretion disc, which psychologically looks like a "Flying Saucer"...Historically, we were unconscious of Galaxies.  As astronomers gained knowledge of these Spiral Galaxies, it appears that the general public then started to use the term "Flying Saucer".  The term was probably coined in 1947 after the Kenneth Arnold sighting of UFO's.  So historically, we were unconscious of Galaxies and then getting more conscious of them (in about 1947), psychology in action...Some Planets, many Star Systems and Galaxies have this structure, one of the most basic forms (Platonic) or geometries in our Universe...