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PBS Digital Studios: Space Time | Why is the Earth Round and the Milky Way Flat?


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Our universe is not a very diverse place when it comes to shapes. Large celestial bodies become spheres, galaxies become discs, and there is little room for variation. Why is this? Well it turns out physics has some pretty strict rules when it comes to creating new planetary bodies. On this week’s Space Time, the equilibrium and symmetry are explored, the two defining factors that shape our universe.

 

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