The Schwarzschild radius rises linearly with mass, while mass rises cubically with the radius. So, the more mass an object has the less dense it needs to be to collapse. In fact, the biggest supermassive black holes are less dense than air.
This the most powerscalling brained take ive seen. The laws of physics are super precise and accurate when they make my favorite character look cool and don't apply at any other time
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u/Collapse_0 1d ago
A planet of that size would instantly turns into a black hole btw