A device illustrating the sequential phases of the Moon, often constructed as a series of images bound together allowing for a quick succession of views. This educational tool visually demonstrates the lunar progression from new moon, through its waxing phases (crescent, first quarter, gibbous), to full moon, and subsequently through its waning phases back to new moon. For example, a set of drawings or photographs depicting the Moon’s appearance on successive nights, when assembled as described, provides a tangible representation of the cycle.
Such illustrative devices offer a simplified and engaging means of understanding astronomical phenomena. Historically, physical models have played a vital role in education and scientific communication, providing accessible representations of complex processes. This type of aid can be particularly useful for learners who benefit from visual or kinesthetic learning styles, aiding in the comprehension of cyclical natural events and spatial relationships within the solar system.