ASGuide

Discover the wonders visible in your sky tonight.

ASGuide (Astronomy Sky Guide) turns your location and observing time into a personal guide to the night sky. Discover visible planets, galaxies, nebulae, stars, star clusters, and galactic regions. Plan an observation, explore from home, or find your next celestial target.

Find objects worth viewing and learn more about every discovery:
- See what is visible from your location and when to observe it. View rise, transit, and set times.
- Filter by magnitude, altitude above the horizon, constellation, object type, and more.
- Search by common name, catalog number, constellation, object type, or detailed classification.
- Browse the solar system and deep-sky categories.
- Return quickly to recent searches and recently viewed objects.
- See which planets are visible.
- Save favorite objects for future viewing.
- Use your current location or select any location on Earth.
- Check sunrise, sunset, twilight, and night times.
- Follow the current moon phase, illumination, moonrise, moonset, and the next new and full moons.
- Open high-resolution imagery and explore objects with the interactive sky atlas.

Customize the Home screen with the information that matters to you. Use the dark appearance for nighttime observations, or the standard iOS appearance.

Your next night-sky discovery starts with ASGuide.