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The ion and neutral mass spectrometer and the ultraviolet imaging spectrograph found the atmosphere contains water vapor. The mass spectrometer found the water vapor comprises about 65 percent of the atmosphere, with molecular hydrogen at about 20 percent. The rest is mostly carbon dioxide and some combination of molecular nitrogen and carbon monoxide. The variation of water vapor density with altitude suggests the water vapor may come from a localized source comparable to a geothermal hot spot. The ultraviolet results strongly suggest a local vapor cloud.
The fact that the atmosphere persists on this low-gravity world, instead of instantly escaping into space, suggests the moon is geologically active enough to replenish the water vapor at a slow, continuous rate.
Originally posted by spacedoubt
LOL, You're so right..I'm used to it..
But just look at this moon..such an unusual place..
unusual features. It's also seems to be "out of round".
A little bit egg shaped.
Originally posted by Ohio_Ron
Not to be critical, but this pic is showing the moon in a phase. I.E., the sun is reflecting it's light off of a part of this moon, not a full disc. It's just like our moon and it's phases. In this photo, the sun seems to be delivering its light from the left and traveling right, that is why it "seems" to be egg-shaped.
Enceladus (en-sel'-a-dus, Greek Εγκέλαδος) is a moon of Saturn discovered in 1789 by William Herschel. Despite its small size, Enceladus has a wide-range of surface types ranging from old, heavily cratered surfaces to young, very smooth terrain. Given its position in Saturn's E ring, the youthful appearance of portions of Enceladus' surface, the recent discovery of a short-lived atmosphere, and a hot spot near the south pole, it is likely that Enceladus is active today.
Originally posted by GoldEagle
P.S cmdrkeenkid, funniest thing I heard today.