Accurate astronomical calculations powered by NASA JPL ephemeris data. No external API dependencies — all calculations are done locally using pure mathematics.
Features:
- Moon phases (new moon, first quarter, full moon, last quarter) with illumination percentage
- Next/previous new moon and full moon dates
- Sunrise and sunset times for any GPS location worldwide
- Solar noon, day length calculation
- Civil, nautical, and astronomical twilight times
- Equinox and solstice dates for any year (1900-2100)
- Zodiac signs based on exact astronomical position of the sun
- Complete solar and lunar eclipse calendars
Use cases:
- Astronomy education and outreach apps
- Photography planning (golden hour, blue hour, twilight)
- Gardening and farming (planting by moon phases)
- Astrology apps (accurate zodiac sign calculations)
- Calendar and timekeeping applications
- Outdoor event planning (sunrise/sunset times)
- Religious and cultural observances