the component of the velocity of an object, esp a celestial body, directed along a line from the observer to the object
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use radial velocity in a sentence
The upper curve shows the radial velocity of the star during the650 period of variation.
The ninth column gives the proper motion (μ), the tenth the radial velocity W expressed in sir.
The following table contains all stars with a radial velocity greater than 20 sir.
A large radial velocity seems therefore to be a galactic phenomenon and to be correlated to a great distance from us.
The radial velocity is, numerically, greater than could have been supposed.