Question

what did you learn about star movement during this investigation?

Explanation:

Since no details of the investigation are given, a general answer could be that stars have both proper - motion across the celestial sphere and radial - motion towards or away from us. Proper - motion is due to the stars' own velocities in space relative to the Sun, and radial - motion can be detected through the Doppler effect in their spectral lines.

Answer:

Stars have proper - motion across the celestial sphere and radial - motion towards or away from us, with proper - motion being their motion relative to the Sun in the plane of the sky and radial - motion detectable via the Doppler effect in spectral lines.