NightSky

Library of J

About this app

Discover the stories, stars, and patterns of the night sky with NightSky, an offline guide designed for curious stargazers.
Explore an interactive star map filled with constellations and stars of varying brightness. Drag to move across the sky, pinch to zoom, tap a star to view its name, magnitude, and type, or select a constellation to highlight its complete shape.

Browse 20 major constellations, including Orion, Ursa Major, Cassiopeia, Scorpius, Taurus, and many more. Each constellation includes:

• A detailed star map
• A short mythology story
• Bright-star names, magnitudes, and color types
• The best month for viewing
• A favorite option for quick access

Check the Planets Tonight guide for a simple month-based overview of visible planets, viewing suggestions, and fascinating facts.

Customize your experience by selecting the Northern or Southern Hemisphere and adjusting the background star density.

NightSky is built for private, distraction-free exploration:

• Works completely offline
• No account required
• No advertisements
• No location or GPS access
• No camera access
• No special permissions

Take a quiet journey through the stars—wherever you are.