"Would dust get into the upper atmosphere on Mars, such that it could be sampled by some sort of a fly by?"
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A Deeper Look into the Watery Plumes of Enceladus
NASA astrobiologists are hard at work examining the nature of the plumes of water vapor recently discovered on Saturn’s moon Enceladus. If a new geological theory about the plumes, published in this week’s Nature, proves to be correct, it would preclude the existence of a subsurface ocean on the moon. The theory is testable with existing data from NASA’s Cassini mission…
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