Credits & data sources
Cosmik is free, has no login, and runs entirely in your browser. It stands on a lot of generous open data and software:
Live satellite data
CelesTrak — orbital elements
Real two-line element sets (TLEs) for 30,000+ Earth-orbiting objects, by Dr. T.S. Kelso. Fetched live in your browser; CelesTrak data updates roughly every two hours.
celestrak.org ↗satellite.js — orbit propagation
SGP4/SDP4 propagation runs entirely in your browser to compute each satellite's live position from its TLE. No backend, no tracking.
github.com/shashwatak/satellite-js ↗Imagery
NASA / ESA — planet photographs
The photo shown when you open a planet's details is a real public-domain image from NASA / ESA missions (Cassini, Voyager, Hubble, MESSENGER, Mariner, Rosetta), via Wikimedia Commons.
images.nasa.gov ↗Natural Earth — coastlines
The Earth globe's continent outlines use Natural Earth vector coastline data (public domain).
naturalearthdata.com ↗Procedural planet & Sun textures
Planet surfaces in the 3D scene, the Sun, rings, comet and satellite sprites are generated procedurally in-browser — no external imagery, no licensing required.
Sky data
Constellations & stars
Constellation line figures use approximate bright-star positions (RA/Dec, J2000) from public star catalogs. Facts about each planet are drawn from NASA's planetary fact sheets and are human-reviewed — never AI-generated.
NASA Planetary Fact Sheets ↗Type & tools
Fonts
Space Grotesk and Inter, served via Google Fonts under the SIL Open Font License.
Built with
Next.js, React, three.js, React Three Fiber, @react-three/drei, @react-three/postprocessing, Tailwind CSS, Motion, and Zustand.
Cosmik — a free, no-login 3D solar system & satellite explorer. Made for the space-curious.