As a planet, Mars can be described as an astronomical
object.
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An eclipse is an event in which an object in space is
temporarily blocked from view by either by passing behind another
astronomical object, or having another astronomical object pass
between it and the viewer.
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The astronomical object does not. A model does.
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A birthtime is the time at which a person or astronomical object
was born.
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the path that an astronomical object such as a planet, moon, or
satellite follows around a larger astronomical object such as the
Sun