The colour of a star is changing from blue to red. This indicates that the star is_______
A. approaching the earth
B. going away from the earth
C. is stationary
D. emitting waves of only blue and red lights
Answer:B
The colour of a star is changing from blue to red. This indicates that the star is_______
A. approaching the earth B. going away from the earth C. is stationary D. emitting waves of only blue and red lights