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How to Explore Proton-Proton Chain Fusion 3D Explorer

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Open Proton-Proton Chain Fusion 3D Explorer, run each of the 3 real reaction steps in order, and read the real energy each one releases.

  1. Open https://freetoolonline.com/space-3d/proton-proton-chain-fusion.html and wait for the 6 starting protons to render.
  2. Click "Step 1: p+p → d" to fuse two proton pairs into deuterons and watch the positron and neutrino fly outward; the facts panel shows 1.44 MeV released.
  3. Click "Step 2: d+p → He-3" to fuse each deuteron with a spare proton into helium-3 and watch the gamma ray fly outward; the facts panel shows 5.49 MeV released.
  4. Click "Step 3: He-3+He-3 → He-4" to fuse the two helium-3 nuclei into helium-4 and watch the two free protons eject; the facts panel shows 12.86 MeV released.
  5. Click "Auto-play" to step through the whole sequence automatically, or "Reset" to start over from 6 free protons.

Key published figures

FigureValue
Step 1 (p+p → d), x2 per chain1.44 MeV
Step 2 (d+p → He-3), x2 per chain5.49 MeV
Step 3 (He-3+He-3 → He-4)12.86 MeV
Net full chain (4p → He-4)26.73 MeV

Next: the when guide or vs alternatives. Open the Proton-Proton Chain Fusion 3D Explorer.

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

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