Caelivus

Caelivus is a planetarium for explorers of history and culture. Stand under any sky from 9999 BCE to 10000 CE, with precession applied so the pole star changes across the ages. Many skies, one dome • Western 88 IAU constellations with stick figures and mythology • Chinese Three Enclosures and Twenty-Eight Mansions • Arabic, Native American, Egyptian, Vedic (nakshatra), and Polynesian wayfinding traditions • Switch cultures on the live sky map in one tap Time Machine Jump to any UT moment across nearly 20,000 years. Replay historical nights — Halley’s Comet in 1066, Kepler’s Star, Apollo-era geometry, and far-future precession — or scrub time forward by second, minute, hour, day, or year. Living phenomena Explore solar and lunar eclipse windows, planetary conjunctions, comets, meteor showers, and educational satellite passes. Atmosphere effects include extinction, scintillation, and twilight phases. 3D Observatory Spin the Sun, Moon, and planets in interactive 3D models, with clear notes on geology, exploration, and observing tips. An orrery shows Solar System geometry for your chosen date. Built for learning — and for privacy Caelivus works fully offline. No account, no tracking, no ads. Journals, bookmarks, and settings stay on your device; export or erase them anytime. Caelivus is an educational simulation: Keplerian orbits and simplified lunar theory for learning and visual exploration — not a professional eclipse-chasing or navigation ephemeris. Open the sky. Choose a culture. Travel through time.