RANKED GUIDE
Five satellite tools compared on what actually differs between them — viewing, pass prediction, raw data, and participation. WorldEye is our pick for free tracking in context on a 3D globe; Heavens-Above wins on pass predictions; CelesTrak is the data source. Here's how to choose.
Last reviewed: October 2026
Almost every tracker computes positions from the same public orbital element data — the TLE catalog — propagated with standard models. So positions broadly agree, and “which is most accurate” is usually the wrong question. What differs: purpose (watching live, predicting visible passes, or consuming raw data), presentation (flat map, 3D globe, tables), and context — what else shares the screen with the satellites.
Rank accordingly: pick the tool whose purpose matches yours. The list below is organized by genuine best-fit, not by catalog size.
Live satellite tracking on a free 3D globe — no signup — with the planet attached: flights below, weather systems, earthquakes, wildfires and 74,229 ground cameras on the same screen. The pick for watching orbit as part of the living world, not as dots on a chart. The satellite layer is free; Pro adds a satellite imagery view and analyst tools.
Compare WorldEye vs WorldEyeA long-running satellite tracking site with live positions, maps and pass predictions for individual satellites, organized by category and object. The enthusiast's reference when you follow specific satellites and want their details in one place.
Compare N2YO vs WorldEyeThe authoritative public catalog of orbital element data — the TLE sets that trackers, researchers and software use to compute where satellites are. Not a casual viewer; it is the data source much of the ecosystem is built on, and invaluable if you work with orbits programmatically.
Compare CelesTrak vs WorldEyeA classic observer's site that predicts when satellites and the space station will pass over your location, and how bright they will be. If your question is 'when can I go outside and see it?', this is the specialist built to answer exactly that.
Compare Heavens-Above vs WorldEyeAn open network of satellite ground stations run by volunteers worldwide, sharing observations and telemetry. A different kind of tool — participation as much as tracking — and the pick if you want to receive satellites, not just watch them plotted.
Compare SatNOGS vs WorldEyeLive satellites arcing over a spinning 3D Earth, with flights, weather and cameras below. Open it and look up.
The short version: tracked objects in Earth orbit are cataloged with orbital element sets — TLEs — that describe each orbit mathematically. Software propagates those elements forward in time to compute where each satellite is right now and where it will be next. CelesTrak distributes much of that catalog data publicly, which is why so many good trackers exist on top of it.
Two consequences follow. First, positions are predictions from a model, not live telemetry — excellent ones, refreshed as new elements are published. Second, the interesting differences between tools are what they do with the same math: a globe for watching, pass tables for observing with your own eyes, or a ground-station network for actually receiving the signals.
Watching satellites for fun
WorldEye's free globe — satellites in motion over the real planet, with flights, weather and cameras underneath. No account needed.
Seeing a satellite with your own eyes
Heavens-Above — location-based pass predictions with brightness estimates are exactly what it was built for.
Following a specific satellite
N2YO — per-satellite pages, maps and pass details make it the enthusiast reference for individual objects.
Building apps or receiving signals
CelesTrak for the orbital data itself; SatNOGS if you want to join the open ground-station network and receive satellites for real.
Unusually for a tracking category, the core of satellite tracking is free: the orbital catalog is public, pass prediction sites are free, and live viewers like WorldEye's satellite layer cost nothing with no signup. Money enters at the edges — professional conjunction and space-situational-awareness services, commercial data products, and premium features inside general platforms.
On WorldEye specifically: tracking satellites live on the globe is free, full stop. The optional Pro tier (weekly $7.99, monthly $13.99, annual $74.99) adds a satellite imagery view — looking at the Earth from orbit, a different thing from tracking orbits — alongside the OSINT toolkit, maritime and cyber/GDELT intel, advanced search filters and the AI analyst. If all you want is to watch satellites move, you never need it.
Plainly: if your question is “when will the station pass over my house tonight, and how bright?” Heavens-Above answers it better than a globe does. If you need the raw orbital elements themselves, CelesTrak is not a competitor to any viewer — it is the source the viewers are built on. Specialists win their specialties; this guide ranks WorldEye first only for the job most people actually have: watching orbit live, in context, for free.
For watching live: WorldEye's free 3D globe or N2YO, both free. For pass predictions: Heavens-Above. For the underlying data: CelesTrak. “Best” depends entirely on which of those jobs you mean.
Yes — large, bright objects like the space station are the easiest satellites to follow on any tool here, and the ones worth predicting with Heavens-Above for a naked-eye sighting when a pass lines up with darkness at your location.
A two-line element set: a compact text format describing a satellite's orbit at a moment in time. Trackers propagate TLEs with orbital models to compute live positions. CelesTrak is the best-known public distributor of these catalog sets.
Free satellite tracking on a 3D globe — no signup, nothing to install.
Prefer the dedicated tracker page? Open the satellite tracker
Satellite tracker
Live satellite positions on a 3D globe — the page this guide is about.
Space station tracker
Follow the station's orbit on the same live globe.
Features
Everything the globe can do — free layers and Pro intelligence tools.
Pricing
Weekly $7.99, monthly $13.99, annual $74.99 — satellite tracking stays free.