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Illuminated Earth-Moon-Sun orrery - electronically controlled
This model demonstrates the path of the Earth and Moon around the Sun. By looking at this illuminated model of the Earth and Moon, impressive natural phenomena - such as solar and lunar eclipses - can be demonstrated in a way that is very simple to understand. The motion of the Earth-Moon system is via a continuous, electronically adjustable speed control.
Simple operation
The models of the Moon and Earth are mounted on an arm, which serves as a handle extension from the other side of the model of the Sun. The motion of the entire system is controlled by hand using this handle. It lets you move as fast or slow as you want and also allows you to repeat demonstrations of phenomena as often as you like. The electronic speed control allows you to adjust the rate of movement so that even otherwise extremely difficult to see details can be easily understood.
Operation of this orrery is via a mains adapter included in delivery. Alternatively, you can easily change to manual operation. This orrery can demonstrate day and night, the seasons, and solar and lunar eclipses in way that is very easy to follow. It can be used to help solve many other questions such as:
- why does it alternate between day and night?
- when and where on earth is it summer and winter at any time?
- what is a month exactly?
- in which orientation can we see the moon from the earth - either partially, fully or not at all?
- why and when do solar and lunar eclipses occur?
- what effect does the tilt of the Earth's axis have on the seasons?
- All these questions can be simply and understandably answered using this orrery. It should therefore be standard equipment in every school and observatory!
- Features:
- intense lighting of Earth and Moon
- demonstration of solar and lunar eclipses
- electronically controlled drive - speed adjustable
- krypton lighting, electronically stabilized - adjustable
- elaborate, completely hand-made brass gearing
- all transmission parts are gold-plated , including the gears ( brass spur gears )
- display the seasons
- Technical details:
- model length - 85cm
- 13kg in weight
- Sun is 2-piece aluminium shell, about 18cm in diameter
- diameter of Earth - about 12cm
- diameter of Moon - about 4cm
- diameter of the stand: about 20cm
- eccentric adjustment for Moon
- krypton lighting: 2.4V/0.6A ( with spare bulb )
- electronically controlled drive (Earth/Moon system)
- switch for changing to manual operation
- operation is via mains adapter (included)
MADE IN GERMANY
