When an exoplanet transits a star, additional absorption lines appear at wavelengths associated with methane (CH_4) and water vapor (H_2O) What can scientists infer based on the additional absorption lines?
Answer
A
The star is producing methane and water vapor as a result of fusion.
B
The exoplanet is moving away from Earth, creating a Doppler shift.
C
The star's atmosphere contains methane and water vapor.
D
The exoplanet's atmosphere contains methane and water vapor.