Orrery: A Solar System

New: Stargazer School. Six illustrated mini lessons with real NASA photography. Earth is free; one purchase unlocks the whole solar system, once.

An orrery is a mechanical model of the solar system. This is yours, alive in light.

Open the app and fly: all eight planets, Pluto, the Moon, and a working asteroid belt orbit a glowing Sun in real relative motion. One finger orbits the camera, a pinch zooms, and a tap on any world glides you to its sunlit side.

Earth and the Moon are free to explore in full. One purchase unlocks the whole solar system. No subscription, no ads, no accounts, ever.

EXPLORE Every world has a full page: a spinnable globe, NASA-sourced vital statistics, an animated size comparison, and a "Did you know?" carousel.

LISTEN A narrated story for every world, written from NASA sources.

THE GRAND TOUR An eleven-stop guided cruise from the Sun to Pluto.

STARGAZER SCHOOL New in 1.1: six illustrated mini lessons on the big questions. Why days and years happen, the farthest we have ever traveled, how telescopes see back in time, living in space, Hubble and Webb, and the Space Station overhead. Interactive diagrams and real NASA photography.

THE COSMIC QUIZ Five fresh questions every run, drawn from sixty.

IN YOUR ROOM Place the solar system on your table with AR. Toggle true distances and walk to Neptune.

TRUE SCALE One switch spreads the orbits to real relative distances. Space is unimaginably empty; feel it.

Built for curious kids and the adults who point at the sky with them. Fully supports VoiceOver, Dynamic Type, and Reduce Motion. Collects nothing, tracks nothing.