Description
The product is a C4 envelope with dimensions of 324X229MM and a brown self-seal. It comes in a pack of 250 and is called "Marlin." The envelope is versatile and can be used to demonstrate various astronomical concepts such as night and day, seasons, phases of the moon, eclipses, and the changing length and direction of shadows. It can also show the apparent motion of the sun.
A versatile and cleverly engineered model which can be used to demonstrate night and day, seasons, phases of the moon, eclipses, changing length of days, changing length and direction of shadows during a day and during a season as well as the suns apparent motion.
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