Explore
free flightFly wherever you like. Dock with passing spacecraft, return to Earth, or build a small base on Mars.
Web · Browser learning game
Fly through a to-scale universe.
Over 900 celestial objects sit at their actual positions, at their actual distances. Click a target, and the autopilot flies you there. Or you steer yourself past stars, planets and nebulae.
01 / The idea
A universe at the right scale.
Every star, planet, moon and nebula and every galaxy sits at the right position and at the right distance. The Oort cloud lies far out, so the flight there takes a long time.
Nobody tests you before you are ready. You fly around, take a closer look and read up on what you see.
Through the universe in 3 steps.
- 01
Pick a target
Click an object, and the autopilot flies you there across the actual distance. Or you steer yourself.
- 02
Get close and scan
Fly close to an object and scan it. A card explains in simple words what you are looking at.
- 03
Earn knowledge, rise in rank
Every discovery adds knowledge points and lifts you from cadet toward commander, at your own pace.
Choose how you play.
You can switch at any time. All ways to play are freely available, and there is no time pressure.
Scan
EnterStay close to an object, and you see what it is, how big it is and how far away.
Missions
LGuided lessons with a set goal.
Quiz
QTest what you have seen. A wrong guess costs nothing.
Ascend
rankEvery knowledge point moves you up, from cadet to commander.
Guided tour
GThe tour flies you to the best-known objects. You do not have to steer.
Explained at your level.
The same universe, explained at 3 levels. You can switch at any time.
Explorer
More guidance and simpler words, the overview first. For the youngest.
Researcher
Numbers, names and the reasons behind them. For everyone who wants to know more.
Expert
NASA-level detail, with technical terms.
★ Object of the day
HR 8799: a system with four directly photographed planets.
One of the first star systems whose planets were photographed directly. There is a new object of the day every day.
What applies to all projects.
No account, no tracking
Your progress is stored only on your device. Nobody tracks you, nothing is sold.
Easy to read
A high-contrast mode, a brightness control, and motion can be switched off.
Checked facts
At NASA level, in simple words.
Hosted in Europe
Run by Ankarina on servers in Europe.
Where will you fly first?
Open the game ↗ Runs in the browser at boundless-expanse.com. Nothing to install.
Three directions, one curiosity.
- 02 · Between · Connections
Boundless Knowledge
From the stars to your body, from music to mathematics: 16 worlds, and every link between them comes with an explanation and a source.
- 03 · Below · Ocean
Boundless Deep
Swim from a sunlit coral reef down to the Challenger Deep, past kelp forests and black smokers, and visit the wrecks of Titanic, Endurance and Bismarck.