An astronomer is trying to detect an exoplanet via the radial velocity method. Which of these changes to a particular planet will make it easier to detect, if everything else about the planet is unchanged?
A) increasing its radius
B) increasing its mass
C) increasing its orbital period
D) All of these are correct.

Question

Quizplus · Accepted Answer

Increasing the mass of the planet increases its gravitational pull on the star, causing a larger wobble that is easier to detect with the radial velocity method. Increasing the radius or orbital period does not directly affect the star's motion in a way that enhances detectability by this method.

An Astronomer Is Trying to Detect an Exoplanet Via the Radial