
Learn the universe in the order it makes sense.
Ten worlds move from direct observation to Earth, the Moon, planets, forces, stars, galaxies, science tools and exploration.
Open the mission map →
SPACE FIRST CLASS My journeyEnglish edition A complete learning universe for ages 0-10
See it. Hear it. Move it. Test it. Explain it. Remember it. Space First Class turns 100 connected ideas into a real visual journey from the sky above your home to the edge of the observable universe.

One truth • five genuine learning experiences
Choose once. Every lesson automatically changes its narration, language, depth, activity and evidence question.

Ten worlds move from direct observation to Earth, the Moon, planets, forces, stars, galaxies, science tools and exploration.
Open the mission map →Build the Solar System, classify space objects, create Moon phases, test an orbit and launch a mission.
Enter the space laboratory →
Every lesson includes safe talk, observation or household activities—and what to listen for when understanding clicks.
Open the grown-up guide →Interactive Solar System gateway
Explore each planet's surface, atmosphere, temperature, day, year, moons, rings, gravity and mission history inside its full lesson.
Planet sizes simplified for comparison • Distances not to scale
Ready now
Day and night happen because the Sun lights one half of Earth while Earth rotates.
Start learning →025Earth, Moon & SunMoon phases are changing views of the Moon's sunlit half as the Moon orbits Earth.
Start learning →045Planetary WorldsJupiter is the largest planet, a gas giant with powerful storms, a strong magnetic field and many moons.
Start learning →046Planetary WorldsSaturn is a gas giant surrounded by a spectacular ring system made of countless orbiting pieces.
Start learning →051Motion, Forces & SpaceGravity is the mutual attraction of mass and shapes falling, orbits, planets, stars and galaxies.
Start learning →061The Sun & StarsThe Sun has layered regions, from a fusion-powered core to the visible photosphere and extended atmosphere.
Start learning →066The Sun & StarsA star is a massive sphere of hot plasma held together by gravity and powered for most of its life by fusion.
Start learning →073Galaxies & Other WorldsA black hole is a region bounded by an event horizon from which light cannot escape.
Start learning →079Galaxies & Other WorldsExoplanets are planets orbiting stars beyond the Sun.
Start learning →091Exploration & Our FutureRockets accelerate by expelling propellant, and launch systems use guidance and stages to place payloads on planned trajectories.
Start learning →Public-service education
Optional completion, favorites and recent lessons remain only on the family's own device and can be reset at any time.