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J02

Tour the Solar SystemModule 8Dwarf Planets and Outer Reservoirs
Module 8 / Lesson 22 of 3027 min
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What makes a dwarf planet different from a planet?

How do orbit, roundness, and the crowded neighborhood around a world produce an official classification?

Use the IAU criteria as a decision process, then separate physical nature from a category created for communication.

Artistic lineup of Pluto, Ceres, and Eris against a dark solar-system background.
Vastward artistic comparison. Sizes, spacing, lighting, and surface appearances are composed and are not shown to one scale.

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Full Lesson includes
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  • Interactive model or evidence lab
  • Sources, checkpoint, and saved reflection
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