Space Station >> Space Station Glossary
Space Station Glossary Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Zenith:
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The point on the celestial sphere directly above the observer. Opposite the nadir.
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Zero gravity:
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A condition in which gravity appears to be absent. Zero gravity occurs when gravitational forces are balanced by the acceleration of a body in orbit or free fall.
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