Orrery
A location-aware astronomy companion. Explore planetary arcs, track the Moon, discover constellations, and watch the sky come alive — in real time.
A location-aware astronomy companion. Explore planetary arcs, track the Moon, discover constellations, and watch the sky come alive — in real time.
The sky at a glance
A complete sky simulation engine — from sunrise to the outer planets, all calculated for your exact location.
See the Sun's full daily path plotted as a precise altitude arc. Track sunrise, solar noon, golden hour, and sunset for any date.
Real-time moon phase, illumination percentage, and altitude arc. Rise, transit, and set times calculated to the minute.
Mercury to Neptune, plus dwarf planets — each plotted on the arc chart with rise/transit/set and current altitude shown.
Scrollable star atlas rendered in the app. Browse the 88 IAU constellations as a strip anchored to your local sky.
All 110 Messier objects overlaid on the constellation view, with brightness-based rendering and rotation for the current epoch.
Upcoming International Space Station passes calculated live from fresh orbital elements — no account or internet required at runtime.
Pan and zoom the arc chart across hours, days, or months. See next week's full moon rise or plan a meteor shower viewing session.
Uses your device GPS for precise calculations. All computations happen on-device — no data is sent to any server.
A beautiful home-screen widget showing the live solar arc. Resize it from compact to full-width, in multiple sizes.
Free to download. No account required. Just open it, point your phone at the sky, and explore.