الحسابات الفلكية ورؤية الهلال

The Astronomical Calculations app is a specialized tool for calculating the crescent moon's visibility and determining the beginning of the Islamic months with high accuracy. Features: • Crescent moon visibility calculation using three international standards: Yallop (1997), Odeh (2006), and Mapimus (2021) • Monthly lunar calendar displaying the moon's phases for each day • Positions of the five visible planets (Mercury, Venus, Mars, Jupiter, and Saturn) • Comparison of crescent moon visibility across multiple cities simultaneously • 28 integrated Arab and Islamic cities • GPS location support • Sharing observation results as images • Customizable settings for default and favorite cities Accuracy and Technology: • Calculating engine based on the VSOP87 theory for calculating celestial body positions • Calculating accuracy up to ±10 arcseconds • Works entirely offline • All calculations are performed locally on your device This app is designed for astronomers and those interested in astronomy, crescent moon observation, and determining the beginnings of Islamic months.