Labs
Interactive, physics-driven explainers. Every number on these pages is computed from the physics printed beside it, or read from a named published model.
Stellar Fusion Lab
How stars forge the elements: from the first proton–proton fusion, through helium, carbon, neon, oxygen and silicon burning, to the iron core that can burn no more, the collapse that follows, and the elements beyond iron. Choose a star's mass and watch its core evolve; every equation opens a step-by-step derivation.
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