Updated 20 October 2026
About.
A free, realistic 3D solar system and planetarium in the browser, built on published astronomy and checked against it.
What it is
Our Solar System is a free, realistic 3D solar system and planetarium that runs in the browser, with no sign-up. The Sun, the planets, our Moon and about 16,600 active satellites are drawn where they are right now. You can zoom from the whole solar system down to the Earth's surface, switch to true scale, track the International Space Station, replay eclipses, or open the planetarium for the night sky from where you stand.
Around the 3D viewer the site answers the questions people ask about the sky: what is up tonight, the Moon's phase, the next eclipse or meteor shower, when the ISS passes over, the aurora forecast and how far away each planet is, worked out for the moment you read the page.
Who makes it
It is made by Polyxmedia, which also publishes its videos as Voidmode Studios (@voidmode). Write to hello@polyxmedia.com about anything on the site.
Where the data comes from
Positions come from published astronomy. The viewer places the planets from JPL's orbital elements and the Moon from the Meeus lunar theory; the planetarium uses the VSOP87 planetary theory with precession, nutation, aberration and refraction; the satellites come from CelesTrak's orbital elements, run through SGP4. The stars are the HYG and Tycho-2 catalogues, the Milky Way NASA's Deep Star Maps from Gaia, and most of the planets and moons are mission imagery from NASA, the USGS, ESA and NOAA (Venus, Mars, Uranus and Neptune still use Solar System Scope's maps while their mission maps are prepared).
Facts on the pages come from NASA fact sheets, JPL, the US Naval Observatory, NOAA's Space Weather Prediction Center, NASA's eclipse tables and the International Meteor Organization, and each page lists its sources. Every dataset, image and library is credited on the credits page.
How it is checked
The numbers are checked against the references astronomers use: planet and Moon positions against JPL Horizons, rise and set times and Moon phases against the US Naval Observatory, eclipse shadows and contact times against NASA's tables. The checks are scripts and tests kept with the code, and their results are written down with the date they were run. How accurate it is lists each one: what was compared, against what, and the result.
How it is paid for
The viewer, the planetarium and every page are free, with no ads. The site is paid for by things you can buy if you want them: the screensaver and live wallpapers, VR and AR mode, the desktop app of the Qmax rocketry game (free to play in the browser) and star map prints. Some sky event and planet pages recommend telescopes, binoculars and eclipse glasses from Agena AstroProducts and say so where they do; we earn a commission on what is bought through those links. What we collect, and why, is on the privacy page.
Teachers and venues
There are free lessons for teachers, from age 5 to university and beyond, played in the live viewer, each with its sources and curriculum links. Domes, museums and events can license it on the licensing page.
Found a mistake?
If something on the site is wrong, tell us at hello@polyxmedia.com or through support, with the page and what the right value is, and where it comes from if you know. We check it against the source and correct it, and a correction reaches every page built from the same data on the next build.
Open the 3D viewer →