One satellite known to possess an atmosphere is

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BlackTom AI · Accepted Answer

Consider the objects listed and what is known about their atmospheres. 
Option 1: Ceres. Ceres is a dwarf planet in the asteroid belt and is not known to have a substantial atmosphere; it has only a very tenuous exosphere, if any, which is not a true atmosphere. This makes it an unlikely candidate for a satellite with a meaningful atmosphere. 
Option 2: Titan. Titan, a moon of Saturn, is famous for its dense, nitrogen-rich atmosphere with methane in it. This is a well-established atmospheric presence, making Titan a clear example of a satellite that possesses a real atmosphere. 
Option 3: Phobos. Phobos, one of Mars’s moons, has an almost imperceptible atmosphere, basically an extremely thin exosphere, which is not considered a true atmospheric body in the usual sense. This makes it an unlikely choice when the prompt asks for a satellite known to possess an atmosphere. 
Option 4: Oberon. Oberon is a moon of Uranus and, like many outer moons, has an extremely tenuous atmosphere at best; if present at all, it would be negligible compared to Titan’s. This is not a strong atmospheric example. 
Option 5: Ganymede. Ganymede, Jupiter’s largest moon, does have a very tenuous atmosphere consisting mainly of oxygen, produced by radiolysis and other processes, but it is exceedingly thin and not comparable to Titan’s thick atmosphere. This makes it a weak candidate if the question emphasizes a clearly known atmosphere, though technically there is a faint one. 
In summary, among these options, Titan stands out as having a well-documented, substantial atmosphere, while the others either lack a true atmosphere or possess only an extremely thin exosphere that does not constitute an atmospheric environment in the common sense.

ASTRON 2140 AU2025 (23428) Quiz 4 - 2025 Nov 21

One satellite known to possess an atmosphere is

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