Why is Saturn's moon Titan able to retain an atmosphere
A)Titan only contains light gases which are easy to retain.
B)Titan has a large enough mass and is cold enough.
C)Titan is biologically active.
D)It is so close to Saturn that Saturn's gravity retains Titan's atmosphere.

Question

Quizplus · Accepted Answer

Titan has a large enough mass, which creates enough gravitational force to hold onto its atmosphere. In addition, the moon is very cold, which helps to slow down the molecules in its atmosphere, making them easier to retain.

Why Is Saturn's Moon Titan Able to Retain an Atmosphere