Scientific thinking · A guided course

How we know things about space

Follow the evidence from a question to a conclusion worth trusting.

Investigate real space discoveries through the questions, observations, models, and comparisons behind them. Learn to read uncertainty, check a surprising image, and explain both what the evidence supports and what it leaves open.

6 lessons48 min of lessons + 7 min challengeBeginner

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No prerequisites · Learn at your own pace

NASA/Ames/JPL-Caltech · Brightness-coded first-light image · Image source ↗

Learning points

— earned

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 togetherFollow the evidence5 questions · 7 min · Final review

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

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