Astronomy Picture of The Day - Jan 16
M83: The Southern Pinwheel
https://apod.nasa.gov/apod/astropix.html
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at : https://en.m.wikipedia.org/wiki/Density_wave_theory
Under :
Galactic spiral arms
we can see animations of stars and spiral arms of galaxies (not what i expected to see)Have this playing while looking at this picture :)
