Mission: Clear Skies for Everyone
Constellation exists to make stargazing accessible, informed, and unforgettable. We believe everyone deserves to witness the cosmos unobstructed by light pollution and unpredictable weather.
Connecting observers with the night sky
Light pollution affects over 80% of the world's population. Finding truly dark skies requires planning, timing, and local knowledge. Constellation brings all that intelligence into one platform—so you can spend less time researching and more time under the stars.
Whether you're photographing the Milky Way, tracking a meteor shower, or simply sharing a quiet moment with the universe, we're here to help you find your window.
Real-time light pollution overlays, Bortle scale ratings, and satellite imagery to pinpoint the clearest horizons near you.
Meteor showers, planetary alignments, eclipses, and lunar events—all with visibility scores tailored to your location.
A curated space for buying and selling astronomy gear, with detailed condition notes and seller descriptions.
Your complete stargazing toolkit
Tonight View
Real-time sky conditions, moon phase, and optimal viewing windows for your location.
Event Calendar
Never miss a meteor shower, eclipse, or planetary conjunction with personalized alerts.
Dark-Sky Finder
Interactive maps showing light pollution levels, drive times, and weather forecasts.
Session Planner
Build detailed observation itineraries with target lists and timing recommendations.
Precision data you can trust in the field
Authoritative celestial event data and daily featured imagery direct from NASA
Planet and moon positions calculated for your exact location and time — accurate to the arc-second
Cloud cover, seeing quality, and light pollution scored in real time from multiple weather sources
Built by stargazers, for stargazers
Constellation was born from countless nights spent searching for dark skies, checking weather apps, and wishing there was one place that brought it all together. We built the tool we always wanted—and now we're sharing it with the community.
Ready to explore?
Start planning your next observation session today.