Solar System Order Game
Play a free solar system ordering game right in your browser. Tap the 8 planets one at a time in the correct order — outward from the Sun (Mercury to Neptune), or by size from largest to smallest (Jupiter to Mercury). A wrong tap doesn't cost you the round; it just counts as a mistake so you can try again. See your score, accuracy, and the full correct order at the end. No sign-up, and nothing is saved.
A free game where students tap the 8 planets into the correct order — by distance from the Sun or by size — with instant feedback on every tap and a recap of the correct order at the end.
Not a test — nothing is saved after you leave.
Ready to order the planets?
Tap each planet in the right order, starting from the first one.
How to use the solar system order game
- 1Choose Distance from the Sun or Size (largest to smallest).
- 2Press Start round.
- 3Tap the planet you think comes next in the sequence.
- 4Keep going until all 8 planets are placed, then see your score and accuracy.
When this is useful
Learning planet order
Build real recall of the order of the planets outward from the Sun, one tap at a time.
Comparing planet sizes
Practice a second, genuinely different ordering — largest to smallest by diameter — so it's not just one memorized fact.
Space unit warm-ups
A quick, self-checking activity to open or close a solar system lesson.
Review before a quiz
Play a few rounds so students can check their own recall before a test on the solar system.
Examples to try
Distance from the Sun
Tap the planets starting with Mercury and ending with Neptune.
Size, largest to smallest
Tap the planets starting with Jupiter (the largest) and ending with Mercury (the smallest).
A perfect round
Place all 8 planets correctly with zero mistakes to earn the Perfect Order badge.
Tips for better results
A wrong tap doesn't reset your progress
If you tap the wrong planet, it just counts as a mistake — your already-placed planets stay in place, so you can keep trying.
Try both orderings
Distance from the Sun and size are genuinely different orders for the same 8 planets — practicing both avoids mixing them up.
Use the sequence rail as a memory aid
Each filled slot shows the planet you just placed, so you can see the pattern building as you go.
Aim for zero mistakes
The score starts at 100 and drops 10 points per mistake, so a clean run is worth chasing.
How the solar system order game works
Every round uses one of two settled, uncontroversial orderings of the same 8 planets: outward from the Sun (Mercury through Neptune), or by diameter, largest to smallest (Jupiter through Mercury). Pluto is deliberately left out, since it was reclassified as a dwarf planet in 2006 — there's no ambiguity about whether it counts.
Tap a planet, and the game checks it against the very next spot in the sequence. A correct tap fills that spot; a wrong tap doesn't get placed at all, so the board always reflects only confirmed-correct progress, and you can immediately try again.
Everything runs in your browser — nothing you tap is uploaded, and no score or progress is saved after you leave the page.
Private by design
- No account and no sign-up. Just open it and start.
- Everything runs on your device, so the mode you choose and the planets you tap during a round stays with you.
- Nothing you create is uploaded. No values, names, scores, or generated content are sent to our servers.
- We use Google Analytics only for basic, anonymous pageview counts. It never receives what you enter into the tool.
Frequently asked questions
Is the solar system order game free?
Yes, completely free, with no account and no limit on how many rounds you play.
Does it include Pluto?
No. Pluto was reclassified as a dwarf planet in 2006, so this game sticks to the 8 official planets to avoid any ambiguity.
What's the difference between the two modes?
Distance from the Sun orders the planets Mercury through Neptune, outward from the Sun. Size orders them by diameter, from Jupiter (largest) to Mercury (smallest).
What happens if I tap the wrong planet?
It's not placed and it counts as a mistake, but your progress so far is safe — just tap the correct next planet to keep going.
How is my score calculated?
You start each round at 100 points and lose 10 points per mistake, so a perfect run scores 100.
Is it good for classroom use?
Yes. It works well as a whole-class warm-up on a projector or as an individual review activity on a device.
Does this use AI?
No. This is a browser-only game with a fixed set of facts about the 8 planets. It does not use AI, and the game runs on your device.
Are scores saved?
No. Your session-best score stays in your browser for the current session only and is cleared when you leave the page.
Always free · No account needed · Nothing you type ever leaves your device.