Physics, 17.12.2021 22:10 monaec1757

The leading explanation for the existence of spiral arms are: Group of answer choices shock waves from cyclic supernovae explosions. shock wave from the quasar-like eruption of the galactic core. tidal streams of small galaxies being torn up by our monster Galaxy. passages of massive globular clusters through the galactic plane. passages of spiral density waves through the interstellar medium.

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