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planetarium

n.
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

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Word of the Day

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  • planetesimal hypothesis
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    Idiom of the Day

    from scratch
    from the very beginning
    We decided to build the house from scratch.



    1.
    If you can adhere to the ________ rules of a military society, the Marines may be an excellent career choice.

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