The angle of star proper movement is the direction of the apparent motion of a star across the sky as observed from Earth. It is measured in degrees and is influenced by the star's proper motion, which is its actual motion through space.
The angle of star proper movement is calculated by measuring the star's position in the sky at two different times and calculating the change in its position. This change is then converted into an angle measurement.
A star's proper motion is caused by its actual movement through space. This can be influenced by a variety of factors, including its own motion, gravitational interactions with other stars and objects, and the rotation of the Milky Way galaxy.
Yes, the angle of star proper movement can change over time due to the star's own motion, as well as any external influences. However, these changes are typically very small and may not be noticeable within a human lifetime.
The angle of star proper movement is not directly related to a star's distance. However, a star's distance can affect its apparent proper motion, as closer stars will appear to have a larger angle of proper movement compared to more distant stars with the same actual motion.