CAL20000

Discover the celestial intricacies with CAL20000, an advanced lunar-solar calendar and astronomy software that offers precise calculations and comprehensive displays of celestial events and configurations. It caters to enthusiasts of Korean or Chinese lunisolar traditions and serves stargazers as a digital observatory and cosmic timekeeper, capable of transporting users through an astounding span of 20,000 years, from 9,999 BCE to 10,000 CE.

Users will find themselves immersed in a detailed display of celestial mechanics, including the precise positions and motions of the Sun, the Moon, and the planets, accurate to the minute. The interface includes a month/day table, vivid visualizations of planetary orbits, and a rich star map sourced from the esteemed Yale Bright Star Catalog 5th edition. Users will marvel at the comprehensive information regarding events like planetary stations, retrograde motions, conjunctions, oppositions, and various other astronomical occurrences.

The star map is not only a practical resource but also a vibrant cultural tapestry, weaving together Korean and Western constellations while rendering the visible sky based on the observer's zenith, thus adding depth and context to astronomical observations. The platform offers various calendar systems including traditional Korean and Chinese daily units, the 24 solar terms, and lunar phases with eclipses, as well as historical Korean and Buddha eras, alongside Islamic and Easter calendars.

With its commitment to accuracy, users can reference Julian day numbers for time verification. For aficionados of East Asian traditions, the inclusion of the Kusung and KiMoon Calendars, as well as decade luck information, imbue the experience with historical resonance.

CAL20000 enables its users to navigate celestial phenomena, past or present, and to anticipate future events with ease and precision. It stands as a comprehensive guide to the stars—precise, profound, and perpetually revealing, equipping users with a gateway to the vast cosmos.