Sol
Our Solar System, placed where it is today.
A 3D N-body simulator in your browser
Fly through real and imagined star systems
Teskooano (tes-koo-ah-no) puts our Solar System and endless generated systems in your browser, with every body pulling on every other. GPU-baked planets, ray-traced black holes, a guided Grand Tour, and as many viewports as you like.
Start with a system
All systemsOpen in simulator
TRAPPIST-1
An ultracool dwarf with seven rocky planets in a resonant chain, three of them in its habitable zone.
Kepler-16
The first transiting circumbinary planet: a Saturn-mass world orbiting a K and an M dwarf every 229 days.
Alpha Centauri
The nearest stars: Alpha Centauri A and B on an 80-year orbit, and Proxima Centauri 8,700 AU out with two planets.
HD 189733
A K dwarf with the transiting hot Jupiter HD 189733 b, the first exoplanet whose colour and winds were measured.
TIC 4206066
Candidate: two transit-like signals in TESS light curves of a K dwarf 116 light years away, a hot rocky world on a 3.2-day orbit and a sub-Neptune on an 11.1-day one. Found in 2026 by an amateur working with Claude; TESS observes it again from 31 October 2026.
Barnard's Star
The nearest single star to the Sun, 6 light years away: a red dwarf with four planets smaller than Earth, all closer to it than Mercury is to the Sun.
Generate your own
Any seed makes a new system: single and binary stars, neutron stars, black holes, planets, moons, rings and comets, under a sky of its own. The same seed always makes the same system.
Browse all 21 systemsWhat you can see
How it works
Real N-body physics
Every body pulls on every other. Orbits stay stable for years of
simulated time, satellites stay in orbit at any time scale, and you
can switch to ideal Kepler orbits at any point.
Take the Grand Tour
Let the camera fly between the most interesting bodies in a system,
orbiting each with a short note, or focus and follow any body
yourself.
Multiple views
Open as many engine views as you like in a dockable layout, each with
its own camera, focus and panels.
Works everywhere
Runs in any modern browser, adapts to phones, and installs as an
offline app that updates itself.
New here? Get started or readthe guides.
News
All news- ReleaseGoldilocksThe habitable zone around every star, a catalogue of strange stars, pulsar beams, belts you can fly into, plans and Founders, and a calmer simulator.
- ReleaseGargantuaGargantua and the systems of fiction, worlds shaped by plate tectonics, cinematic flights, real barycentres, a new HUD with photo mode, and teskooano.space with accounts and Claude.
- ReleaseGrand TourThe Grand Tour, realistic black holes, planets with real geology, real gas giants and rings, a sky for every system, stable and faster physics, and a refreshed interface.
“…my first Teskooano had already been set up in the observatory which I had constructed on the planet Mars.”
How it's built
TypeScript, Three.js with WebGL shaders, RxJS and Dockview. Thedev diary follows along, and bug reports and ideas are welcome onMastodon.For developers.