-The graph above indicates that from -30 to -10 kpc, a spiral galaxy is rotating __________ us whereas from 10 to 30 kpc, the spiral galaxy is rotating __________ from us.
A)toward, away
B)away, away
C)toward, toward
D)away, toward

Question

-The graph above indicates that from -30 to -10 kpc, a spiral galaxy is rotating __________ us whereas from 10 to 30 kpc, the spiral galaxy is rotating __________ from us. 
A)toward, away 
B)away, away 
C)toward, toward 
D)away, toward

Quizplus · Accepted Answer

The graph indicates a change in velocity relative to our position. If one side of the galaxy is moving towards us (from -30 to -10 kpc), it means that side is rotating in our direction. Conversely, if the other side (from 10 to 30 kpc) is moving away, it indicates that side is rotating away from us.

-The Graph Above Indicates That from -30 to -10 Kpc