Penelope's Page · Bolts & Bindings

Moon Phase

A compact astronomical phase reference. Choose a date to view the Moon's eight-phase classification, approximate illumination, lunar age, and next principal phase.

Choose date

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Illumination —

Lunar age —

Cycle position —

Motion —

Next principal phase —

Moon Phase Calendars → Daily Synthesis →">Daily Synthesis → Present Sky → Moon Reference →

Phase and illumination are calculated from the Moon's synodic cycle. Exact astronomical event times can vary from this date-level display. The disc is a north-up schematic; apparent orientation in the sky varies by observer location and viewing angle.