Compare
A live satellite tracker in 3D
Space Radar places about 17,000 active satellites in 3D for the moment on the clock, from public orbital elements, and ranks which will pass over you, with Starlink trains, a debris census and re-entries. Cosmoscope also draws about 16,900 live satellites in 3D. Here is what each does.
Open Space Radar
Free, in the browser, no account.
Side by side
| Cosmoscope | Space Radar | |
|---|---|---|
| Satellites drawn | About 16,900 | About 17,000 active ones, each with a card and its source |
| Sky events | Five fixed presets | Eclipses, meteor showers, conjunctions, rise and set, from your place |
| First load | About 36 MB | about 1.9 MB (measured 7 November 2026) |
| Languages | English | 11 (machine-drafted, under review) |
What Cosmoscope does that Space Radar does not
- Millions of stars in 3D (2.4 million from ATHYG, 7.8 million from Gaia).
- The asteroid belt, the Trojans and the outer bodies at catalogue scale, on a true-scale map out to the Virgo cluster.
- Descending to the ground anywhere on Mars, where Space Radar stands only at its landing sites.
What Space Radar does that Cosmoscope does not
- Sky events computed for your place, against Cosmoscope's five presets.
- 33 guided trips read aloud, with captions.
- 11 languages; Cosmoscope is in English.
How this page was checked
What it says about Cosmoscope was read on 7 November 2026 from Cosmoscope, its live satellite tracker, in the project's competitor review. Products change: if something here is out of date, tell us on GitHub (it needs a free GitHub account) and it will be corrected. Space Radar is not connected with Cosmoscope, and the names are their makers' trademarks.