Titan's polar vortex stands illuminated where all else is in shadow. Scientists deduce that the vortex must extend higher into Titan's atmosphere than the surrounding clouds because it is still lit in images like this. Although the south polar region is now in winter, the Sun can still reach high features like the vortex.
Titan (3,200 miles, or 5,150 kilometers across) is Saturn's largest moon. For a color image of the south polar vortex on Titan, see PIA14919. For a movie of the vortex, see PIA14920.
This view looks toward the Saturn-facing hemisphere of Titan. North on Titan is up and rotated 32 degrees to the right. The image was taken with the Cassini spacecraft wide-angle camera on February 3, 2014 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 742 nanometers.
The view was obtained at a distance of approximately 134,000 miles (215,000 kilometers) from Titan. Image scale is 8 miles (13 kilometers) per pixel.
Image credit: NASA/JPL-Caltech/Space Science Institute
No comments:
Post a Comment