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. 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.

Kit 1: Our Solar System Solar System · grades 4-5 · 25 questions Kit 2: Stars & Constellations Stars · grades 4-5 · 25 questions Kit 3: Earth Moon Sun System Solar System · grades 4-5 · 25 questions Kit 4: Space Exploration & Technology Space Exploration · grades 5-6 · 25 questions Kit 5: Gravity & Orbits Gravity & Orbits · grades 5-6 · 25 questions Kit 6: Galaxies & the Universe Galaxies & Cosmology · grades 6-7 · 25 questions Kit 7: Stellar Life Cycles Stars · grades 6-7 · 25 questions Kit 8: Cosmology & Big Bang Galaxies & Cosmology · grades 7-8 · 25 questions Kit 9: Galaxies & Deep Space Galaxies & Cosmology · grades 6-8 · 25 questions Kit 10: Stellar Life Cycles Stars · grades 6-8 · 25 questions Kit 11: Exoplanets & Habitability Space Exploration · grades 6-8 · 25 questions Kit 12: Space Technology & Exploration Space Exploration · grades 6-8 · 25 questions Kit 13: Cross-Topic Connections Solar System · grades 5-6 · 25 questions Kit 14: Real-World Applications Space Exploration · grades 6-7 · 25 questions Kit 15: Misconceptions & Reasoning Solar System · grades 6-7 · 25 questions Kit 16: Advanced Synthesis Solar System · grades 7-8 · 25 questions

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.
CosmosForge mascot

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 →

Kids also liked

AppCosmosForgePlayTableForgePlayClaimCraftPlayDebateForgeBookCosmosForge — storybookStoryInside · MindForge

Privacy & how it works