CalculationTime

Sun, Moon & Sky

Time Duration Calculator
Main sky instrumentThe Crux PerpetualThe Southern Cross clock-calendar: Crux as the hand, the South Celestial Pole as the pivot, and Earth as the movement.Main solar-system instrumentThe Grand OrreryThe flat-plane Grand Orrery for planetary positions, alignments, eclipse context and poster-quality astronomical charts.Reference-frame instrumentThe Spiral Grand OrreryShows how planetary ellipses become helices when the moving Sun is included.Source-backed explainerHow the Solar System Really MovesThe citation-backed companion for the Grand Orrery and heliocentric/galactic motion.Workshop instrumentThe Helical JourneyA helical reference-frame journey model with date, camera, planet and print controls.Workshop observatoryThe ChronometerA multi-scale astronomical observatory for scrubbing time from local sky to cosmic context.Northern sky clockPolaris PerpetualA northern-hemisphere companion concept for star time and pole-centred sky reading.Northern sky instrumentBig Dipper ClockA staged sky-clock concept using the Big Dipper as the readable motion cue.Site alignment toolArchaeoastronomy SimulatorAncient site, solstice and horizon alignment simulator for sky-time interpretation.Personal sky chartNight You Were BornA staged birth-night astronomy product connecting dates, sky positions and shareable charts.Time-in-space instrumentSpatial ChronographA workshop chronograph for treating time as a path through astronomical space.Deep-time calculatorCosmic CalendarA staged calculator compressing cosmic history into calendar scale for comparison.Live lunar calculatorMoon Phase CalendarDaily lunar illumination, new/full moon events and hemisphere-aware phase context.Live solar/sky calculatorSunrise Star MapSunrise time, true sunrise azimuth and the pre-dawn star field for a selected place.Live sky clockSouthern Cross ClockThe historical Southern Cross Clock preserved as its own readable sky-time tool.Foundation calculatorSunrise and Sunset CalculatorLocal daylight times with date, location and solar-position assumptions visible.Foundation calculatorMoonrise and Moonset CalculatorMoon rise/set planning using date, observer location and lunar geometry context.Foundation calculatorMoon Phase CalculatorCurrent lunar phase, age and illumination context with the calculation basis visible.Foundation calculatorDay Length CalculatorDaylight duration from sunrise, sunset, latitude, date and seasonal solar geometry.Foundation calculatorSeasons and Solstices CalculatorSeason markers, solstice/equinox context and calendar timing in one calculator frame.Foundation calculatorEclipse CalculatorEclipse timing and context with the Sun/Moon geometry made inspectable.Sky calendarCelestial AlmanacA printable almanac-style worksheet for sky events and source-bounded astronomy planning.Sky calendarNight Sky CalendarObserving windows, monthly sky notes and moon context for night-sky planning.Sun calendarSolar Noon CalendarSolar-noon planning with local offsets, daylight caveats and printable notes.Season calendarSolstice CalendarJune and December solstice planning with local season and daylight context.Season calendarEquinox CalendarMarch and September equinox planning with astronomy assumptions and source notes.Moon calendarFull Moon CalendarPrintable full-moon dates and planning windows for bright-night context.Moon calendarNew Moon CalendarDark-sky windows, prep dates and lunar caveats for new-moon planning.Moon calendarBlue Moon CalendarUnusual full-moon patterns and printable lunar planning notes.Sky event calendarMeteor Shower CalendarMeteor shower windows, observing notes and visibility planning.Planet calendarPlanetary Event CalendarPlanet watch planning with sky-event context and follow-up calculators.Star-time calendarSidereal CalendarStar-time planning with sidereal context and printable calculation notes.Sun calendarGolden Hour CalendarSunrise/sunset light planning for photography, travel and outdoor timing.Season calendarZodiac Season CalendarA printable tropical-zodiac date planner for seasonal prompts and context.Moon calendarMoon Mood CalendarA lunar prompt planner kept separate from factual phase calculation.Prompt calendarCelestial Prompt CalendarSky-inspired calendar prompts with fact/prompt boundaries kept visible.