In general,which type of planet would you expect to cause the largest Doppler shift in the spectrum of its star?
A)a massive planet that is close to its star
B)a massive planet that is far from its star
C)a low-mass planet that is close to its star
D)a low-mass planet that is far from its star

Question

Quizplus · Accepted Answer

The Doppler shift increases with the velocity of the planet, which is determined by the mass and proximity to its star. A massive planet that is close to its star 
would have the highest velocity and therefore the largest Doppler shift.

In General,which Type of Planet Would You Expect to Cause