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.
🚀 Hello Product Hunt!
I’m thrilled to introduce AstroAlert — a project I built because I always missed spectacular satellite passes without knowing they were happening above me.
AstroAlert calculates all major sky events for your exact location: satellites, planets, comets and even deep-sky objects.
I’d love your feedback: what celestial object would YOU like to track next?
Happy to answer every question! ✨
About AstroAlert on Product Hunt
“Know exactly when satellites pass above you.”
AstroAlert launched on Product Hunt on November 27th, 2025 and earned 116 upvotes and 16 comments, placing #7 on the daily leaderboard. 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.
On the analytics side, AstroAlert competes within Productivity, Education and Science — topics that collectively have 729.5k followers on Product Hunt. The dashboard above tracks how AstroAlert performed against the three products that launched closest to it on the same day.
Who hunted AstroAlert?
AstroAlert was hunted by Théo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of AstroAlert including community comment highlights and product details, visit the product overview.
Théo