Elementary Classmate Planetarium

Orrery planetarium demonstrates individual concepts, one at a time

Supplier:  Science First 6533030

Catalog No. S45168

Includes: Instruction book, Elementary Planetariums

Description

• 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

Specifications

• For Use With (Application): Demonstrate movement between sun, earth and moon
• Height (Metric): 30.48 cm
• Product Type: Orrery Planetarium

• Includes: Instruction book, elementary planetariums
• Height (English): 12 in.
• Quantity: Each