Webb and Keck telescopes team up to track clouds on Saturn'smoon Titan
, and it is also the only planetary body other than Earth that currently has rivers, lakes, and seas. Unlike Earth, however, the liquid on Titan's surface is composed of hydrocarbons including methane and ethane, not water. Its atmosphere is filled with thick haze that obscures visible light reflecting off the surface.
Evolution of clouds on Titan over 30 hours between Nov. 4 and Nov. 6, 2022, as seen by Webb NIRCam and Keck NIRC-2 . Titan’s trailing hemisphere seen here is rotating from left to right as seen from Earth and the Sun. Cloud A appears to be rotating into view while Cloud B appears to be either dissipating or moving behind Titan’s limb . Clouds are not long-lasting on Titan or Earth, so those seen on Nov. 4 may not be the same as those seen on Nov. 6.
"We then realized it was important to find out if the clouds were moving or changing shape, which might reveal information about the air flow in Titan's atmosphere. So we quickly reached out to colleagues to request follow-up observations using the Keck Observatory in Hawai'i that evening. "After negotiations with the Keck staff and observers who had already been scheduled to use the telescope that evening, Imke and Katherine quickly queued up a set of observations. The goal was to probe Titan from its stratosphere to surface, to try to catch the clouds we saw with Webb.
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James Webb Space Telescope view of Saturn's weirdest moon Titan thrills scientistsMeghan is a senior writer at Space.com and has more than five years' experience as a science journalist based in New York City. She joined Space.com in July 2018, with previous writing published in outlets including Newsweek and Audubon. Meghan earned an MA in science journalism from New York University and a BA in classics from Georgetown University, and in her free time she enjoys reading and visiting museums. Follow her on Twitter at meghanbartels.
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