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Loading contentThe radius of the event horizon of a non-rotating black hole of a given mass — the size to which that mass must be compressed to become one. The Sun's is just under three kilometres.
Formula: r_s = 2GM / c²
With the default inputs, schwarzschild radius evaluates to 2.954 km — 1 M☉ → 2.95 km. The validator recomputes this against the known value on every build, so the formula is checked, not asserted.
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