space velocity
Noun
Meaning
space velocity (plural space velocities)
(astronomy) The velocity of a star relative to the Sun
Examples
As stars move through an arm, the space velocity of each stellar system is modified by the gravitational force of the higher density.
The space velocity relative to the Sun is about main.
This yields a 1911 space velocity of km/s.
Using the two measurements together yielded a space velocity of about 100 km/s, moving towards a point about 12 degrees west of Orion 's belt.