The signature of a planet is largest in radial velocity measurements when the planet and star are lined up along the line of sight to the telescope.

Question

Quizplus · Accepted Answer

This statement is true. When the planet and star are precisely aligned along the line of sight to the telescope, the planet's gravitational influence causes the star to wobble back and forth slightly. This wobble affects the star's radial velocity, which can be measured by astronomers. This technique is called the radial velocity method, and it is most sensitive when the planet and star are perfectly aligned, resulting in the largest signature.

The Signature of a Planet Is Largest in Radial Velocity