Line of sight motion is called the radial velocity , and it can be measured using Doppler techniques , which evaluate red-shift in the light spectrum for objects in motion.
(Line of sight motion; is called; the radial velocity) (it; can be measured; ) (Doppler techniques; evaluate; red-shift in the light spectrum for objects in motion)
Line of sight motion it Doppler techniques
is called can be measured evaluate
the radial velocity
red-shift in the light spectrum for objects in motion