Final answer:
True, the Kepler mission uses the transit method to detect exoplanets by observing the dimming of a star when a planet transits in front of it. Kepler's design enabled it to monitor many stars for this purpose.
Step-by-step explanation:
The statement that the Kepler mission uses the transit method of exoplanet detection to measure the dimming of a star when its planet passes in front of it is True. The transit method focuses on the brightness of the star rather than its motion. When a planet crosses in front of the star, the dip in the brightness is measured. If these dips occur at regular intervals, the orbital period of the planet can be deduced, and from the extent of the dimming, the planet's size can be estimated. The Kepler space observatory was specifically designed to continuously monitor the light from over 150,000 stars to find such transiting planets.