Question

1. aldebaran exhibits a redshift in its spectrum. what does that mean about it?

Explanation:

Red - shift in a star's spectrum indicates that the star is moving away from us. This is based on the Doppler effect in astronomy. When a source of light (like a star) moves away from an observer, the wavelengths of the light are stretched, shifting the spectrum towards the red - end.

Answer:

Aldebaran is moving away from us.