Eli5: why are galaxies flat and not sphere?
In: Planetary Science
Galaxies are actually spherical!
Galaxies are mostly composed of dark matter which is invisible to us, but if we could see it galaxies would look like a sphere.
The reason the luminous matter or stuff we see is flat and disk shaped is due to the spinning motion and interactions between all the gas/dust/stars (which dark matter doesn’t feel the same way)
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