Elementary Classmate Planetarium
Orrery planetarium demonstrates individual concepts, one at a time
Manufacturer: Science First 6533030
- Earth and moon manually move independantly from one another
- Ladder chain and gear drive keeps Earth's axis pointed at a 23.5° angle, toward the North Star
- Overall height: 12 in.
- Arm length: 17 in.
- Sun: 5.75 in.
- Earth: 4 in.
Unlit model demonstrates:
- Occurrence of night and day
- Variation in the length of daylight
- Movement of the Earth around the sun from west to east
- Why only one side of the moon is seen from the Earth
- Eclipses of the sun and moon occur
- Phases of the moon
|Demonstrate movement between sun, earth and moon|
|Instruction book, elementary planetariums|
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