✉news SciencePhysics first seen 1 d ago, last 37 min ago, peak #2
Mars dust doesn't explain one of the solar system's weirdest clouds
A long, unusual cloud stretching from Mars's Arsia Mons volcano continues to puzzle scientists. New research rules out suspended dust as the explanation for the feature, which appears each southern-hemisphere spring and can stretch more than a thousand kilometres. The finding narrows the search but leaves the cloud's formation mechanism unresolved, and planetary scientists are now looking at other atmospheric processes to explain it.
Why now: New research ruling out dust deepens a lingering planetary science mystery.
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