1. A building housing an instrument for projecting the positions of the planets onto a domed ceiling 
2. An optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome 
3. An apparatus or model for representing the solar systems

Derived forms: planetaria, planetariums

Type of: building, edifice, model, optical device, simulation

Encyclopedia: Planetarium

• Lowell Jackson Thomas
• Lowell Thomas
• lower
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• Lower California
• lower cannon
• Lower Carboniferous
• Lower Carboniferous period
• lower class
• lower court
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• Lower Egypt
• lower jaw
• lower jawbone
• lower limit
• lower mantle
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• Lower Paleolithic
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