When to Use Planet Interior Cutaways 3D Explorer - Best Sessions and Limits
freetoolonline.com editorial teamThe Planet Interior Cutaways 3D Explorer fits any lesson or curiosity break about what is actually inside a planet - crust, mantle, and core, with a MEASURED or MODELED ESTIMATE badge on every layer.
It is an educational approximation - not a geophysics solver - so a few session types need another tool.
A five-minute "what's inside" demo
A five-minute demo is the ideal session: open the explorer, click Mercury to reveal its outsized core (about 83 percent of its radius), then switch to Jupiter to show a fuzzy, diffuse core with no sharp rocky ball at all. The contrast lands in under a minute.
| Session element | Value | What it shows |
|---|---|---|
| Mercury core share | About 83% of planet radius | An oversized, dense core |
| Mercury-vs-Jupiter contrast reveal | Under 1 minute | A rocky core next to a diffuse, coreless-looking one |
| Full "what's inside" demo | About 5 minutes | One complete planet-interior teaching session |
Teaching evidence, not just facts
The explorer is built for teaching HOW scientists know what is inside a planet, not just reciting numbers. Click a layer and the panel names the mission or method behind it - InSight's seismometer for Mars, Juno's gravity data for Jupiter - so a lesson on planetary interiors doubles as a lesson on how that knowledge was gathered.
Sessions it does not fit
Some sessions do not fit Planet Interior Cutaways 3D Explorer: any time you need outer-size comparisons, orbital motion, or Moon phase geometry. The scene does not compare outer radii side by side and does not model heat flow or convection. For scale-accurate outer sizes, use Planet Size Comparison 3D Explorer. For the Sun's own interior layers, use Sun Structure 3D Explorer. It also needs WebGL in the browser.
Frequently asked questions
Does the explorer show plate tectonics or heat flow?
No. It shows a static MEASURED-or-MODELED-ESTIMATE layer cutaway per planet - crust, mantle, and core - not moving plates or heat convection.
How long does a session take?
About five minutes for the full "what's inside" demo across a few planets; the Mercury-vs-Jupiter core contrast alone shows up in under a minute.
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