Saturn's moon,Titan,has a dense nitrogen atmosphere while the planet Mercury does not.Titan is better able to hold an atmosphere than Mercury because
A) Titan's mass is much larger than Mercury's (equal to Jupiter's).
B) Titan is closer to the Sun than Mercury is.
C) Titan's mass is much smaller than Mercury's.
D) Titan is farther from the Sun than Mercury is.
E) Titan's atmosphere is much hotter than Mercury's.

Question

Quizplus · Accepted Answer

Titan is farther from the Sun than Mercury, which means it is colder and can retain its atmosphere better due to lower thermal velocities of gas molecules.

Saturn's Moon,Titan,has a Dense Nitrogen Atmosphere While the Planet Mercury