Everything in orbit, explained
Explore everything space has to offer — live trackers, explainers and data on the satellites overhead and the solar system beyond, always up to date.
What is in the library
Satellites
Live trackers for the individual objects people look for by name — the ISS, Hubble, Tiangong and the rest — with current position, orbit and next visible pass.
Constellations
Starlink, GPS, Galileo, GLONASS, Iridium, OneWeb and more: how big each fleet actually is today, counted from the live catalogue rather than quoted from a design document.
Reference & explainers
How orbits work, what LEO, MEO and GEO mean, how many satellites are in orbit right now, and how to spot one from your back garden.
Solar system
The planets, dwarf planets and major moons, with a scrollable to-scale 3D tour driven by real orbital positions.
Data & statistics
Charts of the tracked population — by orbit regime, by operator, by launch year — built from the same catalogue that drives the globe.
Every page in the library is grounded in live data rather than a figure copied from an article: counts come from two-line element sets published by Space-Track and CelesTrak, refreshed every two hours, and each page states the date it was counted. That is the difference between an explainer that ages and one that is right this week.