The velocity in space relative to the sun of a star or other object outside the solar system, equal to the vector sum of the proper motion of the object and its radial velocity.
Origin
Early 20th century; earliest use found in Science.
Definition of space velocity in US English:
space velocity
noun
Astronomy
The velocity in space relative to the sun of a star or other object outside the solar system, equal to the vector sum of the proper motion of the object and its radial velocity.
Origin
Early 20th century; earliest use found in Science.