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thomasxin t1_j839eyv wrote

Reply to comment by Client_Hello in Why is the Oort cloud spherical? by Outliver

There are smaller blue stars that can still last a billion years or so, right? That would be at least 4 orbits around the milky way for instance. Though larger ones would obviously not last as long

This is an interesting take though, I've not seen sources explaining spiral galaxies evolving into elliptical ones even without disturbance. What would be the cause of the opposite for galaxies, when normal cloud/sphere orbits collapse into rings?

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