Which method of extrasolar planet detection is able to measure the compositions of extrasolar planet atmopsheres?

Question

Quizplus · Accepted Answer

The transit technique is the only method of extrasolar planet detection that is able to measure the compositions of extrasolar planet atmospheres. During a transit, the planet passes in front of its host star, and some of the star's light passes through the planet's atmosphere before reaching our telescopes. By analyzing the spectrum of this light, astronomers can determine the composition of the planet's atmosphere. Gravitational lensing, the Doppler technique, and the astrometric technique do not provide information on the composition of extrasolar planet atmospheres.

Which Method of Extrasolar Planet Detection Is Able to Measure