Which of these methods for detecting exoplanets requires astronomers to take spectra of the stars around which the exoplanets orbit?
A) astrometric method
B) radial velocity method
C) transit photometry method
D) transit timing method

Question

Quizplus · Accepted Answer

The radial velocity method involves measuring the Doppler shifts in the spectrum of a star as it moves towards or away from us due to the gravitational influence of an orbiting exoplanet, which causes slight changes in the star's velocity.

Which of These Methods for Detecting Exoplanets Requires Astronomers to Take