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Orrery Space 3D Solar System
Planets, moons, asteroids, comets and dwarf worlds with NASA surface maps and mission history, at explorer or true scale. Galaxy mode reaches Sagittarius A*.
Open the 3D modelOrrery Space
A free online orrery: the Solar System, the Milky Way and the stars next door, in 3D
Start Online 3D model“Earth is the cradle of humanity, but one cannot live in the cradle forever.”
Welcome, space explorer!
Orrery Space is a free online orrery: a 3D model of the Solar System that runs in your browser. Fly between planets, moons, comets and dwarf worlds with real NASA maps and real orbits, then leave it all behind: cross the Milky Way to Sagittarius A*, or visit the stars next door.
We hope you have as much fun exploring the universe with Orrery Space as we had building it.
Tonight's sky
The Moon's phase, the planets you can see and the next meteor shower, worked out from Orrery Space's own orbits — with JavaScript on.
Want to know more about Orrery Space, where its numbers come from and who builds it? Find out more
Projects
Everything here is free and runs in the browser. New projects join this list as they ship.
NASA Space Apps 2026
Lunar Mission Browser
Pick a landing site near the Moon's south pole and a date: see its sunlight, solar power and line of sight to Earth, on a live-lit 3D map built from NASA's LOLA laser data.
Open the browser
Read · 59 guides
Explore the worlds
A short guide to every planet, moon, comet and dwarf world in Orrery Space, with the facts and sources, readable on any device.
Browse the guidesNext
More on the way
This page is where new projects will appear. Check the news below.
It's free, thanks to you
Orrery Space has no paywall and no sign-up, and it stays that way. If you like it, you can help:
Three ways in
3D Solar System
Fly between the planets, moons, comets and dwarf worlds, with NASA maps and real orbits, at explorer or true scale.
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Start
Nearby Star Systems
Visit the stars next door: Alpha Centauri, Barnard's Star, Sirius, Tau Ceti and more, with their known planets.
Visit the stars Read about 2,202 planetary systems
Black Hole
Cross the Milky Way to Sagittarius A*, 26,996 light-years away: 4.3 million Suns' worth of mass, with light bent around it. Then race the star S2 through its 2018 pass of the hole.
Go to Sagittarius A* Race the star S2News
We keep improving Orrery Space and adding new features, so this is the best space model we can make.
Recent releases
- Pages for the thirteen hand-checked systems: TRAPPIST-1, Proxima Centauri, Tau Ceti and the rest, each with its planets
- Race the star S2 through its real 2018 pass of the black hole at the centre of the Milky Way
- The cosmic web: 35,525 more galaxies from the 2MASS Redshift Survey, and the superclusters they draw
- Stand on Mars at Jezero, Gale, the Olympus Mons caldera and Melas Chasma, with Phobos and Deimos in the sky
- Compare in 3D: two worlds at one scale, each turning at its real day
- 287 more moons, asteroids, comets and distant worlds, from Celestia's catalogues
- The companion stars of 135 multiple systems, from the Washington Double Star Catalog
- The real stars around the Sun: 50,261 from Gaia DR3 and Hipparcos within 300 light-years
- 4,343 pulsars in galaxy mode, from the ATNF catalogue: fly close and one becomes a lighthouse
- The guided tour reads itself aloud, in English and in Hindi
- Which site, which month? All fifteen south-pole sites ranked for any thirty days, the next two years window by window, a printable report and a sixty-second demo
- A guide to Orrery Space in three levels, from a first flight to where every number comes from
- A three-question quiz on every world's card, from the card's own numbers
- The Local Universe: 10,933 galaxies at their measured distances, and Andromeda one click away
- The real star clusters in galaxy mode: 196 globular and 6,476 open clusters, and search finds them all
- Every known planetary system: 4,728 of them, 6,299 planets, from the NASA Exoplanet Archive
- Stand on the Moon: 5 m ground at eight landing sites, the Sun and Earth at their true size, and a Live sky
- The whole Moon inside Orrery Space: spin it, then stand where a robot would land
- The Lunar Mission Browser goes 3D: a live-lit south-pole map, a sky view from the landing site, playback, and a 30-day sunlight heat map
- Any point from 85°S to the pole can be a landing site; all nine Artemis III regions; dates from 2020 to 2050
- Lunar Mission Browser launched for NASA Space Apps 2026
- The galaxy map's destinations became browsable: nearby star systems
- 59 guides to the worlds published in Explore
- The stellar neighbourhood charted; Sagittarius A* up close
- Galaxy mode: the Milky Way, navigable all the way to Sagittarius A*
- Very long jumps travel through a wormhole
Latest
Race the star S2
In May 2018 the star S2 swung past the Milky Way's black hole at about 7,650 km/s. Ride its real orbit and try to keep pace.
Space Apps Lab
For NASA Space Apps 2026 we built the Lunar Mission Browser: where can a lander at the Moon's south pole get sunlight and talk to Earth? It uses NASA's LOLA terrain, the Deep Space Network, and orbit maths checked against JPL Horizons, with more than 250 automatic checks.
Try: which site, which month? Join us at the Moon's south poleQuestions
What is Orrery Space?
Orrery Space (orreryspace.com) is a free online orrery: a real-scale 3D model of the Solar System that runs in your browser, with the Milky Way, 4,728 known planetary systems and a planner for landings at the Moon's south pole.
What is an orrery?
An orrery is a model of the Solar System that shows the planets moving around the Sun. It is named after Charles Boyle, 4th Earl of Orrery, for whom one was built in the early 1700s. Orrery Space is an orrery for the browser: the planets move on their real orbits, for any date you choose. More about orreries.
Is Orrery Space free?
Yes. There is no paywall, no account and nothing to install. It runs in a modern browser on a computer, tablet or phone.
What is the nearest exoplanet to Earth?
The planets of Proxima Centauri, the closest star to the Sun, 4.2 light-years away. Proxima Centauri b orbits in the star's habitable zone. You can fly there in the 3D view's Nearby systems.
Where is the James Webb Space Telescope now?
Webb orbits the Sun-Earth L2 point, about 1.5 million km beyond Earth, and goes round the Sun with Earth. The 3D Solar System shows where it is today.
How do I choose a landing site at the Moon's south pole?
The Lunar Mission Browser ranks fifteen candidate sites, including NASA's Artemis III regions, by hours of sunlight and of direct contact with Earth, for any thirty days from 2020 to 2050.
About
Orrery Space is built by Harsh Unagar. It began as a 3D Solar System and kept growing: the Milky Way and Sagittarius A*, the stars next door, guides to 59 worlds, and a Lunar Mission Browser for NASA Space Apps 2026.
Every number in Orrery Space has a source, and every approximation is labelled where you see it. The planets' surfaces are NASA and USGS maps; the orbits come from published elements; the Moon's terrain is LOLA laser altimetry.