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Calculate optimal timelapse intervals for sun movement photography. Get location-aware recommendations, see sun path visualization, and plan shoots with physics-based calculations.

The solar declination calculator below shows the sun's declination angle throughout the year for any location worldwide. Calculate daily solar declination values, see seasonal patterns, and export data. Choose between three calculation algorithms and ...

Calculate Earth's distance from the Sun with our solar distance calculator. See live AU, km, and mile measurements with orbital visualization and perihelion/aphelion tracking.

Track the Moon's distance from Earth in real-time with interactive features and export options ...

Interactive sundial calculator showing real-time solar time visualization. Design horizontal sundials with hour lines, gnomon angles, and construction guides for any location.

Calculate shadow length and direction for any object, date, time, and location. Interactive polar diagram shows real-time shadow visualization with animation and export options.

Calculate the sun's analemma figure-8 pattern, equation of time, and solar declination for a date. Export sundial corrections and export astronomical data.

Calculate the exact solar noon time for any location and date. Shows sun's highest point, offset from 12:00, and annual data with CSV export.

Calculate all three types of twilight for any location and date. Compare civil, nautical, and astronomical twilight times side by side.

Calculate astronomical twilight for any location. Find when true darkness begins for deep-sky observation, astrophotography, and faint object viewing.