AstroAlert: Know exactly when satellites pass above you.
astroalert.appVisual Preview
AstroAlert is your personal sky-watch assistant. It tells you exactly which satellites, planets, comets, and deep-sky objects will pass right above your location in the next 24 hours — including spectacular zenith events above 70°. Powered by NASA/JPL data, it combines real-time calculations with educational content, a full astronomy glossary, and detailed object sheets. The sky above you, revealed with precision.
Why follow AstroAlert: Know exactly when satellites pass above you.?
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