Turn a 3D model of the Sun and its eight planets. Find planets from their clues, put them in order and collect every fact card. With 3D glasses the planets float in space in front of you!
🚀 Missions
🃏 Planet album
Do you have 3D glasses? Red-green, red-blue and red-cyan glasses all work.
You can change this any time from the menu.
3D GLASSES
Your glasses
Check the 3D
How deep?
Less depth is easier on the eyes. More depth pops out more.
1. Hide the green bar
Put the glasses on and cover the eye behind the green lens, so you look only through the red lens. Slide left until the green bar disappears.
2. Hide the red bar
Now cover the eye behind the red lens, so you look only through the green lens. Slide left until the red bar disappears.
3D mode is just a fun way to play. If your eyes feel tired, take a break or play without glasses.
HOW TO PLAY
Each mission asks 6 questions. Read the clue, find the planet and tap it. Drag the model to turn it; 🔭 From above shows the orbits as circles, and ⏸ Freeze stops the planets moving.
Order questions: tap the planets one after another, going out from the Sun.
Some questions have more than one right answer, like "a planet with no moons": any of them counts.
No mistakes gets ⭐⭐⭐. Every right answer unlocks a fact card in your Planet album (3 cards for each planet).
🔭 Explore freely shows the names, and tapping a planet opens its album page.
The model is not to scale: the real planets are much smaller and much further apart. If Earth were a peppercorn, Neptune would be 2 kilometres from the Sun!
HOW 3D WORKS
Try this: hold your finger in front of your nose and look at it with one eye, then the other. It jumps! Your eyes see from two places about 6 cm apart.
Your brain uses the jump to judge distance. That is stereo vision. The game draws the solar system twice, from two eyes a little apart, in red and in green (or blue). The glasses give each eye its own picture.
Astronomers use the same trick to measure how far away the nearest stars are! They look at a star from two sides of Earth's orbit, six months apart, and measure how much it seems to jump. This is called parallax.
The planets go round the Sun at different speeds: the closer a planet is, the faster it goes. Mercury's year is 88 days; Neptune's is about 165 of our years. Freeze them and watch!