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Researchers used Curiosity's Navigation Camera (Navcam) to take two sets of eight images of the sky on an early Martian morning last month. For one set, the camera pointed nearly straight up. For the other, it pointed just above the southern horizon. Cloud movement was recorded in both and was made easier to see by image enhancement.
A midday look at the sky with the same camera the same day showed no clouds
York's Charissa Campbell produced the enhanced-image sequences by generating an "average" of all the frames in each sequence, then subtracting that average from each frame, emphasizing any frame-to-frame changes. The moving clouds are also visible, though fainter, in a sequence of raw images.
"It is likely that the clouds are composed of crystals of water ice that condense out onto dust grains where it is cold in the atmosphere," said Curiosity science-team member John Moores of York University, Toronto, Canada. "The wisps are created as those crystals fall and evaporate in patterns known as 'fall streaks' or 'mare's tails.' While the rover does not have a way to ascertain the altitude of these clouds, on Earth such clouds form at high altitude."
I still remember being convinced by Carlotto that there were henges and remains of monuments. Little bit embarrassed by my credulity on that one, but it was a great feeling to believe we'd explore them.
originally posted by: Kandinsky
a reply to: gortex
Hoagland?! I'm gonna remember that so stock up on aloe vera. Muwahahah
I was listening to a show about the Kuiper Belt and there's the James Webb coming too. So much to look forward to lately. Armchair aficionado heaven
originally posted by: stonerwilliam
What were the clouds made of ? methane