New moons occur when the Moon is positioned between which two celestial bodies?

New moons occur when the Moon is positioned between the Earth and the Sun. This configuration means the side of the Moon that is illuminated by the Sun is facing away from the Earth, rendering it nearly invisible to observers on our planet. This phase is crucial in the lunar cycle, as it marks the beginning of a new lunar month.

Understanding the position of the Moon in relation to both the Earth and the Sun helps clarify why this alignment creates a new moon—the Sun's light illuminates the hemisphere of the Moon that is turned away from the Earth. Observers on Earth see the Moon in shadow, leading to the new moon phase, which can have important implications for various natural cycles, including tides and the activities of nocturnal animals. Additionally, during a new moon, solar eclipses can occur if the alignment is precise, emphasizing the significance of this particular celestial arrangement.