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Trippensee planetarium (US), 1908 Diameter: sun: 14,5 cm earth: 7,5 cm Total height: 35 cm. Total length 50-60cm. Arm length: 42 cm. Age: Description:
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 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. Cartouche: The Trippensee Mfg., Co. Detroit, Mich.On the metal name tag it says: The Trippensee planetarium, pat. U.S. 10, 08 Canada, july 21, 08, The Trippensee MFG, Co Detroit, Mich. USA. $ 3360,- or € 2400,- |