I used supercomputers to simulate the universe in ridiculously high detail where things get interesting and lower detail where not much is happening. You can actually run small simulations on your home computer. But you can’t get anywhere enough detail to match the phenomenon that we observe in local stars and distant galaxies. Something that would take months to run on my laptop can be done overnight on the right supercomputer. Give it a shot yourself if you’re up for it: https://enzo-project.org/
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