Moons and small worlds · A guided course

Comets and dwarf planets

Small worlds, long journeys, limited evidence

Explore comet activity, Pluto and Charon, Ceres, distant reservoirs, and the evidence that distinguishes a visiting object from an invented origin story.

6 lessons54 min of lessons + 8 min challengeBeginner to Intermediate

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Suggested preparation is listed in the course · Start whenever you’re ready

NASA/APL/SwRI · Image source ↗

Useful starting points

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Learning points

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Correct answer: +10
Lesson complete: +25
All lessons complete: +100
Final challenge: +50

Earn each reward once. Retries never cost points.

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Inside this course

6 lessons

Each lesson builds on the last. Read the story, explore the sources, and check your understanding.

0 of 6 lessons complete

— / 530 pointsEarned in this course

Put it all togetherInvestigate an unfamiliar small world5 questions · 8 min · Final review

No account is needed to learn. Your correct answers keep their earned rewards.

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