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abstraction > mathematical concept > number > quantity > velocity > radial velocity
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radial velocity comparison table
Subject is a kind of has definition
velocityquantityThe speed and the direction of an object's motion.
radial velocityvelocityThe speed at which an object moves toward or away from us. It can be measured from a star's spectrum: a star moving toward us has a blueshifted spectrum, and a star moving away from us has a redshifted spectrum. The larger the blueshift or redshift, the larger the radial velocity. The present radial-velocity champion is a star in the constellation Lacerta named Giclas 233-27, which moves toward us at 583 kilometers per second.

Next velocityspace motion    Upvelocity    Previous velocitypeculiar velocity