New Moon
The New Moon occurs when the Moon aligns closely with the Sun in ecliptic longitude. The side facing Earth is unlit, marking the start of the 29.53-day synodic lunar cycle.
- Position in cycle
- 1 of 8
- Phase Angle Range
- 0° to 45° Moon-Sun Phase Angle
- Illumination Range
- 0% to ~5%
Orbital Geometry
Earth, Moon, and Sun sit in rough alignment (conjunction in longitude), placing the Moon between Earth and Sun.
Observational Notes
The Moon is hidden in solar glare and invisible to the naked eye until a thin crescent appears 1–2 days later.
Frequently asked questions
- What happens during a New Moon?
- The Moon is directly between Earth and the Sun, showing no illuminated disk to Earth.