Why Are Galaxies Flat but Planets Round?



Space is vast and has so many secrets to share with us. If we think of any planet, the first image that comes to mind is that of a round object. It can be different in color or surrounded by cloud bands, but still round. But when we think of galaxies, we imagine a thin glittering streak across the sky. Why is it so? Can galaxies be anything other than flat?

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23 thoughts on “Why Are Galaxies Flat but Planets Round?”

  1. I’m pretty sure scientists can answer that but my answer is because planets are rough and galaxies are groups of planets and other material. All them together don’t have to be round.

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  2. Did I miss something? I did not catch the answer to the posed question. I get gravity and angular momentum but I never really heard the reason for the difference. I can imagine in the less dense galaxies, the angular momentum is relatively stronger and stretches out the mass until the forces find an equilibrium. Now add dark matter and that really mucks things up. Still, the title is misleading.

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