To get the space velocity of a star in three dimensions, you need its proper motion, distance, and radial velocity.

Name: To get the space velocity of a star in three dimensions, you need its proper motion, distance, and radial velocity.
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Question

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The space velocity of a star in three dimensions is determined by combining its proper motion (motion across the sky), distance (to convert proper motion from angular to linear velocity), and radial velocity (motion towards or away from us).

To Get the Space Velocity of a Star in Three