Full Moon phase angle
- Input
- 180°
- Expected output
- 100% iluminado
Sun and Moon in opposition as seen from Earth.
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what does full moon mean
The Full Moon happens when Earth sits roughly between the Sun and the Moon (without forming an eclipse), so the lunar hemisphere facing us receives almost complete sunlight. It is the exact opposite point of the New Moon in the 29.53-day cycle.
Sun and Moon in opposition as seen from Earth.
The Full Moon falls near the midpoint of the cycle.
It's the Moon's visual shape at that moment (how much of the Sun-lit disc we can see from Earth), classified into one of 8 traditional names (New, Crescent, First Quarter, Gibbous, Full, and so on) based on the angle between the Sun and the Moon in the sky.
Technically no, the "exact" Full Moon is a single instant (180 degrees phase), but to the naked eye the disc looks full for roughly one to two days before and after that instant.
Because the Moon's orbit is slightly tilted relative to Earth's orbit around the Sun. In most months the Full Moon passes above or below Earth's shadow; an eclipse only happens when the three bodies line up almost perfectly.
The exact date and time change every month; the tool below already opens with the next Full Moon computed in real time in your time zone.
Use the arrow keys to move between days, Page Up or Page Down to change month.
The markers show the exact New Moon and Full Moon within the displayed month.
All Moon phase calculations run locally in your browser, no date is ever sent to a server.