From Where Does Titan's Thick, Nitrogen-Rich Atmosphere Likely Arise

question 23

Multiple Choice

From where does Titan's thick, nitrogen-rich atmosphere likely arise?

• A) photodissociation of methane and ammonia in its atmosphere
• B) emitted by frequent volcanic eruptions
• C) deposited by ongoing cometary impacts over the age of the Solar System
• D) photosynthesis of algae in oceans that lie beneath its icy surface
• E) released from underground reservoirs from early impacts.

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