CosmosForge

An astrophysics odyssey — watch stars be born and die, peer inside black holes, and learn how we measure a universe that dwarfs imagination. Nova, your cosmic guide, connects every idea to real missions like the James Webb Space Telescope.

Level 1

For grown-ups — progress report →A private, on-device snapshot mapped to the skill areas practiced. Export a CSV or print — nothing leaves this device.

Explore the cosmos

Five interactive tools — three rebuilt from the iOS app, plus two you can only do here.

Gravity Lab ✨ new How much would you weigh on the Moon, Mars, Jupiter or Saturn? Predict first, then watch the scale reveal it — weight = mass × gravity, and your mass never changes. Starlight Decoder ✨ new Read a star's spectrum the way astronomers do: each element leaves a fixed pattern of dark lines, and light stretched toward red means the object is racing away. Predict the element, or which galaxy is farther, before the spectrum reveals it. Exoplanet Transit Lab ✨ new Find planets around other stars the way Kepler and TESS do: a planet crossing its star dips the light a little. Predict which star has a planet and how big it is — the dip = (planet ÷ star radius) squared — then reveal. Name That Constellation ✨ new See a real star pattern, connect the dots to trace the figure, then name it — the Big Dipper, Orion, Cassiopeia, Cygnus, Leo, the Southern Cross and more. Stellar Evolution Step through a star's ten life stages — then race the clock to put the lifecycle in order and see how a star's fate branches on its mass. Black Hole Explorer Drag the mass and watch the event horizon grow. Move an observer inward and feel gravity stretch time — with the real physics behind Sagittarius A* and M87*. Cosmic Distance Ladder How do we know how far away anything is? Climb the four techniques — from geometry next door to redshift at the edge of the observable universe.

Practice the concepts

16 kits from the solar system out to cosmology — a short round of questions with a hint whenever you get stuck. Your progress stays on this device.

Mixed practice

Mixed practice — revisit what you’ve learned A short round that shuffles questions from the kits you’ve played, brought back when they’re ready to review. Great for making it stick. CosmosForge Sprint — a calm speed round → Once you’ve mastered a few kits, race your OWN best on what you already know. Timer optional, no penalty for a miss.

Play together

Two ways to keep going — a same-device match with friends, or a voyage through every kit. On-device only; nothing leaves this device.

Cosmos Duel (pass-and-play) 2–4 players take turns on one device — same questions for everyone, highest first-try score wins. Cosmic Voyage — follow the map → A progression voyage through all sixteen kits. Clear each stop of real practice, then travel on.

Meet the cast — the characters who teach this

Each one stands for an idea you’ll practice. Tap a character to read their illustrated story and hear their audio drama.

Ensemble stories — the cast together

Explore all the stories →

📚 Books for CosmosForge

Read the story, print a workbook, or color the cast — free PDFs to read offline or print at home.

Browse all books →

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