File:PIA06241-br500.gif
PIA06241-br500.gif (500 × 465 pixels, file size: 485 KB, MIME type: image/gif, looped, 3 frames, 1.5 s)
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English: Although it is far too cold for blossoming flowers, summer does bring storm clouds and presumably rain to Titan's south polar region. The observed persistence of convective storm activity in the region during the southern Titan summer has led scientists to speculate that the dark, footprint-shaped feature near the upper left could be a past or present reservoir for Titan's methane rains.
This series of three Cassini narrow-angle camera images, centered on the pole, shows the evolution of bright clouds in the region over the course of two hours during Cassini's distant June 6, 2005, flyby of the planet-sized moon. The appearance of the feature seen here is unique among the dark terrains observed thus far on Titan. Other dark areas appear to have angular or diffuse boundaries, while this one possesses a smooth perimeter, suggestive of an eroded shoreline. In addition to the notion that the dark feature is or was a lake filled with liquid hydrocarbons, scientists have speculated about other possibilities. For instance, it is plausible that the lake is simply a broad depression filled by dark, solid hydrocarbons falling from the atmosphere onto Titan's surface. In this case, the smoothed outline might be the result of a process unrelated to rainfall, such as a sinkhole or a volcanic caldera. The images in this movie sequence were taken using a combination of spectral filters sensitive to wavelengths of polarized infrared light, allowing Cassini to see through the obscuring smog of Titan's atmosphere and down to the surface. The images were acquired from an approximate distance of 450,000 kilometers (279,000 miles) from Titan. Resolution in the original images is approximately 3 kilometers (2 miles) per pixel; the images were aligned and reprocessed at the same scale to create the movie. |
Date | |
Source | http://saturn.jpl.nasa.gov/photos/imagedetails/index.cfm?imageId=1581 |
Author | NASA/JPL/Space Science Institute |
Permission (Reusing this file) |
Public domain |
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This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA06241. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 07:32, 29 June 2005 | ![]() | 500 × 465 (485 KB) | Wricardoh~commonswiki (talk | contribs) | First liquid lake found on Titan {{PD-USGov-NASA}} Category:Titan (moon) |
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