Selene Moon Calendar

Your lunar observatory: precise local data, an 8-night planner, Moon Finder, interactive lunar map, event alerts, widgets, and Apple Watch. Offline and ad-free.

Selene is a calm lunar reference for iPhone and iPad. Check the current phase, illumination, age, lunation, distance, and the next major event at a glance.

New in Selene, Orbit turns the Sun, Earth and Moon into a precise spatial model synchronised with the timeline, making phases, orientation and eclipse geometry easier to understand.

Scale: True proportions for Sun, Earth, and Moon. The Sun is 109 Earth diameters wide and about 389 lunar distances away, so a single true-scale drawing would hide the Moon.

New in Selene 1.8: choose how the Moon is rendered visually: the classic Selene look, a natural NASA/LRO-based surface, monochrome contrast, relief shading, or a subtle coordinate grid. The astronomical calculations stay unchanged.