D denden New member Oct 20, 2010 #1 of mercury? Describe why and how the Doppler effect was useful in determining the rotation rate of both Mercury and Venus (distinct reasons for each planet). Be sure your answer includes a brief description of what the Doppler effect is
of mercury? Describe why and how the Doppler effect was useful in determining the rotation rate of both Mercury and Venus (distinct reasons for each planet). Be sure your answer includes a brief description of what the Doppler effect is
