Trippensee planetarium (US), 1908

Height: 35cm,  arm length: 42cm, total length approx. 50-60cm, diam. sun: 15,5cm, diam. aerth: 7,5cm. Planetarium is in very good condition, everything works. The earth is paperbased, the two planets are wood, the sun and the base are brass and the arm and the pillar of the base are wood. The compass works fine. The earth rotates with chain and gears. Basically this unit accurately duplicates orbital relationship of Sun, Earth, Moon, Venus, as well as many other concepts through chain-driven gears rotating the arms of the unit. Moon and Venus are made of wood. These planetariums are durable and reliable gear and ladder chain driven so that the earth maintains its 23-1/2 axis, revolves around the sun and rotates on its axis, all at the same time. The moon revolves around the earth and keeps its one face toward the Earth. Venus also revolves around the sun, and can be positioned by hand, as well, to show phases and where it is located as the morning or evening star. Among the phenomena which the models show are the following: phases of the moon, eclipses of the sun and moon, causes of night and day, seasons in various parts of the Earth, reasons for winter and summer, what the solstices and equinoxes are, the axis of the Earth and its relationship to the North Star, about the tides and their causes, the earth's equator, latitude, longitude and meridians. The Trippensee models have been produced for over 100 years and provide many visual demonstrations that clarify the relationships of these elements of the solar system, in motion, for children and adults interested in learning more about the universe around them. The chain and gear drives on this model provide an exceptionally long life for the product and provide a model that is unequalled in the marketplace today. On the metal name tag it says: The Trippensee planetarium, pat. U.S. 10, 08 Canada, july 21, 08, The Trippensee MFG, Co Dtroit, Mich. USA. On the cartouche on the globe: The Trippensee Mfg., Co. Detroit, Mich.

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