#EL- 400) and the motorized Trippensee® planetarium (item
#EL- 500) are orreries that perform the same functions; the difference being that the
motorized model contains a spring wire connection to the red arm which moves the
planetarium arm to revolve the Earth, moon, and Venus balls around the sun.
These planetariums are durable and reliable gear and ladder chain driven
so that the Earth maintains it’s 23-1/2° axis, revolves around the sun and
rotates on it’s axis, all at the same time. The moon revolves around the Earth
and keeps it’s 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 90 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
unequaled in the marketplace today.
*** Special note: Earth
has a dark blue or black ocean.
Arm length: 16 1/2" Sun: 5 3/4"
Earth: 3" Shipping Weight 18 lbs.
Portable desktop Planetariums have been
produced for over 90 years by Trippensee. They provide many visual demonstrations that
clarify the relationships of the solar system elements in
motion, for children and adults interested in learning more about the
universe around them. Perfect for school or as home planetarium.