Galaxies and cosmology · A guided course

Our galaxy and its neighbors

Read the structure, matter and history behind a galaxy image.

Map the Milky Way from inside, follow matter through stellar populations, and compare galaxy shapes and encounters. Use real observations and explicit models to build outward toward groups and the cosmic web.

6 lessons60 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, H. Ford (JHU), G. Illingworth (UCSC/LO), M. Clampin (STScI), G. Hartig (STScI), the ACS Science Team, and ESA · Image source ↗

Useful starting points

These courses introduce ideas used here. You can follow them first or start this course now.

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 togetherRead a galactic neighborhood5 questions · 8 min · Final review

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

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