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MM21 Trippensee Elementary Planetarium with Lighted Sun - 12 Vol US$199.95

These desktop models are used to demonstrate sun-earth-moon relationships and are recommended for those just beginning to make their acquaintance with astronomy. Each concept can be shown individually moving the arm, earth, moon by hand. Shows basic relationships of rotation, revolution, night and day, seasons and more. The twilight zone ring enables one to understand the nature of dawn and dusk. Chain/gear drive maintains the north pointing axis of the earth. Wood base with plastic spheres and metal drive. A detailed illustrated instruction manual is included.

This product was added to our catalog on Monday 02 March, 2009.
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