B) the rotation of planets. A) the rotation of the Sun. 27. Which of the following CANNOT be detected by using the Doppler effect?

B) the rotation of planets. A) the rotation of the Sun. 27. Which of the following CANNOT be detected by using the Doppler effect? A) the rotation of the Sun. B) the rotation of planets. C) the motion of binary star systems. D) the radial motion of a star moving toward the Earth. E) [All of the above can be detected in this manner, so none is the answer.] F) [None of the above, from A to D, could be detected by using the Doppler effect.]