Space Atlas: Explore & Learn

Choose a city, inspect tonight’s planets and upcoming eclipses, and keep an observing note. Calculations stay on your device; no location permission is needed.

Space Atlas connects reading about a celestial object with planning an observation. Short cards, deeper topics and experiments link scale, motion and light.

SKY CALENDAR Choose a date and city. Inspect tonight's planets, approximate directions and times, sunset, twilight, moonrise and moonset. See calculated local visibility and times for upcoming solar and lunar eclipses. Optional local alerts can remind you of suitable sky events.

OBSERVING LOG Record what you noticed in a short note. Its date keeps the observing place's time zone, and you can share your entries. The log stays on your device and is not included in the general progress backup.

COMPARE THE UNIVERSE Explore a main library of 500 cards, 40 topics, 10 routes and 5 labs. Compare eight planets; use two additional mission experiments to investigate satellite orbits and exoplanet transits. Follow related topics through the concept map.

The free starter selection includes 50 cards, 6 complete topics, 1 route, 2 labs and both additional mission experiments. One-time Premium opens the rest of the main library. No subscription or ads. Apple handles purchases and restoration.

Turkish, English, Spanish and French; light/dark appearance, saved discoveries and a progress backup. Restoring a backup replaces current progress rather than merging records. A question-of-the-day widget is available for Home and Lock Screens.

No account or GPS permission is required. The suggested city comes from your time zone; approximate city coordinates are used for on-device calculations. Core content, experiments and sky calculations work offline; purchases and external links need internet. Results are approximate educational calculations, not guarantees of weather, a clear horizon or actual visibility. Never look directly at the Sun; solar-eclipse observation requires appropriate eye protection.