How have astronomers studied the atmospheres of exoplanets?
A) by timing the duration of consecutive transits
B) by resolving images of exoplanets and searching for color variations
C) by measuring absorption of starlight during transits
D) by measuring emission lines of directly imaged planets

Question

Quizplus · Accepted Answer

Astronomers study the atmospheres of exoplanets primarily by measuring the absorption of starlight as the planet passes in front of its host star, a method known as transit spectroscopy. This technique allows scientists to identify the components of the planet's atmosphere based on which wavelengths of light are absorbed.

How Have Astronomers Studied the Atmospheres of Exoplanets