The Moon Phases in a Paper Box

de Fátima O. Saraiva, Maria and Amador, Cláudio B. and Kemper, Érico and Goulart, Paulo and Muller, Angela (2007) The Moon Phases in a Paper Box. Revista Latino-Americana de Educacao em Astronomia, 4. pp. 9-26. ISSN 1806-7573


Download (710kB) | Preview


We present a very simple concrete model to demonstrate the concept of phases of an illuminated body. The main objective of our model is to help the understanding of the Moon phases as viewed from the perspective of an observer on Earth. The material allows the visualization of two important effects: (1st) even though all the time half Moon is illuminated by the Sun, we see different fractions of the illuminated Moon surface, depending on our angle of sight; (2nd) the orientation of the convex part of the Moon in the crescent and waning phases on the sky also depends on our perspective from Earth. The use of a closed box allows one to see the contrast among the different phases with no need of a dark room. We also present a text on the Moon phases, emphasizing the dependence of the aspect of the bright part on the angle of sight.

Item Type: Article
Subjects: Astronomy Education Research
Depositing User: Dr Michael Fitzgerald
Date Deposited: 03 Dec 2017 07:37
Last Modified: 19 Aug 2018 09:25

Actions (login required)

View Item View Item