The signature of a planet is largest in transit 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. In transit measurements, the planet passes in front of its host star as seen from the observer's line of sight, causing a dip in the star's observed brightness. The magnitude of this dip (i.e. the planet's signature) is greatest when the planet and star are perfectly aligned along the line of sight.

The Signature of a Planet Is Largest in Transit Measurements