Constellation Board: Star and Moon Finder, Luminous Constellation Board This is a "constellation chart" used in the 4th-grade science curriculum for "the movement of stars and the moon." Printed with special ink that stores light, making outdoor observation easier. Science observation materials, Yamato Science Teaching Materials Research Institute Used a few times by a child in science class. There are some scratches and scuffs. No noticeable stains. Size: Approximately 28 x 28 cm For those who understand that this is a used item. Available for immediate purchase.