See what's above you, right now.
Real-time 3D solar system with every tracked satellite — and a 60-minute heads-up before anything passes over your city.
No account needed. We'll email you when the live tracker opens to your city.
Why Real-Time Sky Tracking Matters Right Now
When a real-time solar system renderer hit the front page of Hacker News with 378 points and 104 comments, the reaction was telling. Almost nobody argued about the visuals. The questions were about data provenance — "where does the asteroid count come from?" — and about personal relevance — "can I see what's passing over my own house tonight?" That gap between a beautiful global view and a usable local answer is exactly where current tools fall short.
Existing options force a trade-off. NASA Eyes on the Solar System is authoritative but built for study, not for a quick glance at tonight's sky. Heavens-Above gives accurate satellite pass tables, yet its interface predates modern web expectations and offers no spatial context. Stellarium renders a gorgeous night sky but ignores the thousands of tracked satellites and near-Earth objects moving overhead every hour. Astronomy educators and astrophotographers end up juggling three browser tabs to answer one simple question.
The timing is right because the data is finally open and cheap to serve. CelesTrak publishes fresh two-line elements continuously, NASA JPL Horizons exposes orbital records through a public API, and WebGL runs smoothly in every modern browser without a plugin. What used to require a desktop planetarium and a nightly data sync now fits in a static site. The signal is hot, the sources are trustworthy, and the missing piece is a local, real-time view that anyone can open in one click.
How It Works
Open the live view
Load a WebGL solar system in your browser where every rendered position reflects the current real orbit, pulled from CelesTrak TLE data and NASA JPL asteroid records.
Enter your city
Type a city or coordinates and the tracker highlights which satellites will cross your local sky in the next sixty minutes, ranked by brightness and elevation.
Scrub time and export
Drag the timeline from the past 24 hours into the next 24, then export a timestamped 4K frame with data-source attribution for teaching or sharing.
What You Get
Live, not a video
Every frame is computed from the current orbital position of each object, sourced from CelesTrak two-line elements and NASA JPL records, so what you see matches the sky at this exact moment.
Your sky, not the world's
Enter a city and the view recenters on your horizon, listing which satellites will pass overhead within the hour, with elevation, direction, and a brightness estimate for planning observations.
Export-ready frames
One click produces a high-resolution image stamped with the timestamp and data sources, ready to drop into a classroom slide, a lecture, or a social post without any extra editing.