Planet encyclopedia
Atmosphere, moons, day length, and discovery notes for every major body.
Explore planets →Interactive 3D simulation
Tour the Solar System at your pace
Drag to orbit the camera, scroll to zoom, and crank time so years race by. Click any world for a close look at real orbital periods, sizes, and facts.
- 8major planets
- 1dwarf planet
- ~4.6billion years old
Live solar system
Perspective 3D model with compressed distances so every planet stays in view. Periods and relative sizes stay meaningful.
Sim time
Day 0 · Year 0
Drag to rotate · Scroll to zoom · Tap a planet
Warming up the Sun…
How orbits work
Kepler’s laws, eccentricity, and why outer worlds crawl while Mercury zips.
Study orbits →True scale tools
Line up diameters and AU distances without the usual textbook distortion.
Compare sizes →Got a question or idea?
Tell us what you’d add next — more moons, spacecraft paths, or exoplanet modes.