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How to explore Sun Structure 3D Explorer

Open the Sun Structure 3D Explorer, highlight each solar layer, and read core ~15.7 million K, photosphere ~5,772 K, and corona ~1-3 million K in the facts panel.

Open https://freetoolonline.com/space-3d/sun-structure.html and wait for the cutaway hemispheres and corona halo.
Read the facts panel: core ~15.7 million K, radiative zone, convective zone, photosphere ~5,772 K, corona.
Press Core to highlight the fusion region at the center of the schematic.
Press Radiative or Convective to focus energy-transport layers between core and photosphere.
Press Photosphere or Corona for ~5,772 K surface and ~1-3 million K outer atmosphere, or All for the full cutaway.

Follow four steps: open the Sun Structure explorer, read the facts panel, press Core, then press Radiative or Convective to focus each layer. — Open explorer, read facts, press Core, press Radiative or Convective.

Next: the when guide or vs alternatives. Open the Sun Structure 3D Explorer.

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Last updated: Jul 16, 2026

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