A. Based on the image, Star C does not have the same elements as our sun-star A
B. Star B is moving away from us.
C. Star A is moving towards us
D. Star A is moving the fastest
A.
From the image, Star C does not have the same elements as our sun-star A. Our sun is a G-type star, while Star C is a K-type star. K-type stars have lower surface temperatures than G-type stars and are generally redder in color. They also have a higher abundance of heavier elements, such as oxygen and silicon.
B.
From the image, Star B is moving away from us. This is because the spectral lines of Star B are redshifted. A redshift indicates that the object is moving away from the observer.
C.
From the image, Star A is moving towards us because the spectral lines of Star A are blueshifted. A blueshift indicates that the object is moving towards the observer.
D.
From the , Star A is moving the fastest because the spectral lines of Star A are the most blueshifted. The greater the blueshift, the faster the object is moving towards the observer.