Patterns of stars in constellations hardly change in appearance over times of even a few thousand years.Why?
A)Stars are fixed and never move.
B)Stars move,but they move very slowly-only a few kilometers in a thousand years.
C)Although most stars move through the sky,the brightest stars do not,and these are the ones that trace the patterns we see in the constellations.
D)The stars in our sky actually move rapidly relative to us-thousands of kilometers per hour-but are so far away that it takes a long time for this motion to make a noticeable change in the patterns in the sky.
E)Stars within a constellation move together as a group,which tends to hide their actual motion and prevent the pattern from changing.

Question

Quizplus · Accepted Answer

The stars in our sky move rapidly relative to us, but because they are so far away, their motion only results in a very slow change in the patterns we see from Earth. This is why constellations appear relatively unchanged over thousands of years.

Patterns of Stars in Constellations Hardly Change in Appearance Over