Cosmik — the live map of the cosmos
Cosmik is a free, no-login web app that lets you track the International Space Station, Starlink and more than 20,000 satellites live in 3D, follow the real-time rocket-launch schedule, and get alerts so you know exactly when to look up. Some people call it “the Flightradar24 of space.” It runs entirely in your browser — nothing to install, no account to create.
What you can do with Cosmik
- Track satellites in real time. See the ISS, Starlink trains, Hubble, GPS and thousands more as 3D points orbiting a holographic Earth, with exact positions, altitude and speed.
- Know when to look up. Cosmik predicts the next visible pass over your location and can alert you minutes before, so you can step outside and watch it cross the sky.
- Follow rocket launches. A live launch hub with countdowns, status, launch pads and embedded webcasts — plus alerts before liftoff for launches you follow.
- Get close-approach & reentry warnings. Conjunction (close-approach) predictions and reentry alerts for objects you follow.
- Explore the solar system. Fly between the planets, the Sun, comets and deep-space probes, rendered with real NASA and ESA imagery.
How Cosmik works
Cosmik downloads official orbital data (two-line element sets, or TLEs) from CelesTrak and propagates each object with the industry-standard SGP4model — the same physics professional trackers use — directly in your browser. Visible-pass predictions are computed from your location and the satellite's orbit. Launch data comes from Launch Library 2, space weather from NOAA SWPC, conjunctions from CelesTrak SOCRATES, and deep-space probe distances from NASA JPL Horizons. See the full data credits.
Is Cosmik free?
Yes — the live map, satellite tracking and basic alerts are free and require no login, and always will be. Power users can upgrade to Cosmik Pro — unlimited alerts, a 10-day forecast, X-class flare and personalized aurora calls — which, along with supporters on Ko-fi, covers the ~$60/month it costs to keep Cosmik flying. Supporters get their name in the credits.
Where to go next
- How to track the ISS and catch a visible pass tonight.
- The live satellite tracker — Starlink, Hubble and 20,000+ objects.
- Upcoming rocket launches with live countdowns and webcasts.
