The whole Solar System and every tracked satellite, live in the browser (site) renders a live view of the solar system and tracked satellites directly in the browser. No pricing page was found; it appears to be free to use with no stated pricing model.
Comparison table
| Product | Free tier | Starts at | Best for |
|---|---|---|---|
| 3D-Universe | true | not stated | A free, no-signup all-in-one solar system and satellite view |
| Real Time Solar System | true | not stated | Live maps paired with launch and news tracking |
| Atlas of Space | true | not stated | Deep exploration of planets, moons, and asteroids |
| AstraPixels | true | $5/mo | A stylized pixel-art view with an optional paid extra |
| uphere.space | true | not stated | Satellite tracking with an API for developers |
| Cosmik | true | not stated | Satellite-only tracking with no account needed |
| The Solar System in 10kb | false | not stated | A minimalist, lightweight solar system page |
3D-Universe (site)
3D-Universe covers the same ground as the original: a live solar system plus satellite tracking, no download or signup. It also adds an exoplanet atlas, cosmic zoom, and mission feeds, making it the closest match in scope. It suits people who want one free browser tool rather than switching between a solar-system viewer and a separate satellite tracker. Pricing is stated as completely free with no paid tier. The limitation: it's a newer launch (June 2026) with only 2 launch-day votes, so it has less track record than some alternatives here.
Real Time Solar System (site)
This tool pairs a live solar system map with planetary data, eclipse information, and rocket launch tracking, plus an option to embed the simulation on your own site. It suits people who want solar system visuals tied to current spaceflight news in one place. It's free, with no pricing tiers stated. The limitation: satellite tracking isn't mentioned as a feature, so it's weaker than the original on that specific job. Launch-day traction is also light, at 2 votes.
Atlas of Space (site)
Atlas of Space is built for people who want to understand scale, speed, and orbital relationships between planets, moons, and asteroids, using in-browser Newtonian physics simulation. It suits space enthusiasts who want a "spatial Wikipedia" rather than a dashboard. It's free, with no pricing page found. The limitation: it focuses on solar system bodies rather than tracked satellites, so it doesn't replace that part of the original's job. It has strong traction, with 770 launch-day votes.
AstraPixels (site)
AstraPixels shows an animated solar system map with 171 catalogued objects at their real current positions, rendered in a distinct pixel-art style. It suits users who want a visually different take on live solar system positions. The core map is free; a one-time $5 purchase lets you claim an asteroid. The limitation: satellite tracking isn't part of its stated feature set, and the stylized art may matter less to users wanting a realistic or data-dense view.
uphere.space (site)
uphere.space focuses specifically on real-time tracking and prediction for thousands of satellites, with a free API trial available through RapidAPI. It suits developers or users who care about satellite tracking specifically rather than the whole solar system view. It's freemium, with free core tracking and paid API options implied but not detailed. The limitation: no solar system visualization is mentioned, so it only covers half of the original's job.
Cosmik (site)
Cosmik is described as "the Flightradar of space," showing every tracked satellite live in 3D with no app and no account required. It suits users who want a dedicated, no-friction satellite tracker rather than a combined solar-system-and-satellite tool. It's stated as free, with no pricing page or paid tier found. The limitation: solar system visualization isn't part of its description, so like uphere.space, it covers satellites only.
The Solar System in 10kb (site)
This is a minimalist solar system animation built as an entry in "The Web with Just 10k" challenge, from 2016. It suits people who want a lightweight, fast-loading visualization rather than a feature-rich dashboard. Pricing is not stated, and no free tier is indicated in the listing. The limitation: it's the oldest and smallest-scoped entry here, with no mention of satellite tracking or current pricing terms.
How to choose
If you want one free tool that covers both the solar system and satellites, start with 3D-Universe. If satellite tracking alone is the priority, use uphere.space or Cosmik. If you want deep solar-system exploration without satellites, Atlas of Space or Real Time Solar System fit better.
FAQ
Is the original tool free? Pricing isn't stated, but it appears free to use with no paid tiers mentioned.
Which alternative covers both solar system and satellites like the original? 3D-Universe is the closest match, covering both in one free tool.
Which alternatives are satellite-tracking only? uphere.space and Cosmik both focus specifically on satellite tracking rather than the full solar system view.