The apparent angular movement of a nearby star against the background stars as a consequence of its motion in space is known as:

Question

Quizplus · Accepted Answer

Proper motion is the term used to describe the apparent shift in the position of a star relative to distant background stars due to its actual motion through space. This motion is measured in units of arcseconds per year and can be used to determine the distance, direction, and speed of a star's motion through our galaxy. Radial velocity refers to the motion of a star towards or away from an observer, while tangential velocity refers to its motion perpendicular to the line of sight. Retrograde motion is a term used to describe the apparent backwards motion of planets in the sky, as seen from Earth.

The Apparent Angular Movement of a Nearby Star Against the Background