Other planetary systems are best detected by the Doppler shifts that change the pattern of the star's
A) spectrum.
B) brightness.
C) rotational period.
D) twinkling.

Question

Quizplus · Accepted Answer

The Doppler shift affects the spectrum of a star as the star moves towards or away from us, causing the spectral lines to shift towards the blue or red end of the spectrum, respectively. This shift can indicate the presence of planets that cause the star to wobble slightly in its motion.

Other Planetary Systems Are Best Detected by the Doppler Shifts