The Kepler Space Telescope discovered thousands of exoplanets by measuring
A) reflected light from the planets.
B) periodic variability in the brightness of stars.
C) periodic variability in the positions of stars on the sky.
D) periodic variability in the radial velocities of stars.

Question

Quizplus · Accepted Answer

The Kepler Space Telescope discovered thousands of exoplanets by measuring the periodic variability in the brightness of stars, which occurs when a planet transits in front of its host star from the perspective of the telescope, causing a temporary dip in the star's brightness.

The Kepler Space Telescope Discovered Thousands of Exoplanets by Measuring