Cosmoss
Your Pocket Observatory
Cosmoss is an astronomy and stargazing companion for iOS and Android. It turns your location and the current time into a live picture of the sky above you — what's visible tonight, where to find it, and what it actually is — backed by real astronomical computation, not random or generated content.
What it does
Tonight
A live dashboard of what's actually visible from where you are right now — a stargazing score, the Moon's phase, and which planets are up and when.
Interactive sky map
Pan, zoom, and tap the sky to identify stars, constellations, and planets, with a time machine to see how the sky shifts through the night.
Cosmic events calendar
Meteor showers, eclipses, Moon phases, and planetary conjunctions — computed astronomical events, not a generic reminders list.
Explore the Solar System
Real physical data for the Sun, every planet, and the Moon — diameter, day length, orbit, and more.
Built on real astronomy
Sun, Moon, and planet positions are computed directly on your device using established astronomical formulas — not fetched from a random-data generator. The star field and constellation lines are drawn from published open catalogs, and object facts (diameter, orbit, moons, and more) are drawn from verified reference sources.
Full details, including Cosmoss’s own Privacy Policy and Terms, are on cosmoss.space.