In essence, the Kepler mission searched for extrasolar planets by .
A)obtaining high- resolution photographs of other star systems
B)observing a star carefully enough to notice that it is experiencing a gravitational tug caused by an unseen planet
C)identifying spectral lines that look like what we expect to see from a planet rather than a star
D)monitoring stars for slight dimming that might occur as unseen planets pass in front of them

Question

Quizplus · Accepted Answer

The Kepler mission searched for extrasolar planets by monitoring stars for slight dimming that might occur as unseen planets pass in front of them, which is known as the transit method. This method is able to detect changes in brightness as small as 0.01%, which is a good indication of a planet passing in front of the star.

In Essence, the Kepler Mission Searched for Extrasolar Planets by