Tuesday, September 18, 2012

Titan's South Polar Vortex


Titan's south polar vortex seems to float above the moon's south pole in this Cassini spacecraft view.

The vortex, which is a mass of gas swirling around the south pole high in the moon's atmosphere, can be seen in the lower right of this view. See PIA14919 and PIA14920 to learn more. The moon's northern hood is also visible in the top left of this view. See PIA08137 and PIA12775 to learn more about the hood.

This view looks toward the leading hemisphere of Titan (3,200 miles, or 5,150 kilometers across). North on Titan is up and rotated 25 degrees to the left.

The image was taken with the Cassini spacecraft narrow-angle camera on July 6, 2012 using a spectral filter sensitive to wavelengths of near-infrared light centered at 889 nanometers. The view was acquired at a distance of approximately 1.7 million miles (2.8 million kilometers) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 86 degrees. Scale in the original image was 11 miles (17 kilometers) per pixel. The image was contrast enhanced and magnified by a factor of 1.5 to enhance the visibility of surface features.

Photo credit: NASA/JPL-Caltech/Space Science Institute

Wednesday, September 12, 2012

Pan in the Encke Gap


Saturn's tiny moon Pan orbits in the middle of the Encke Gap of the planet's A ring in this image from the Cassini spacecraft.

Pan (17 miles, or 28 kilometers across) is visible as a bright dot in the gap near the center of this view. See PIA12604 to see Pan casting a long shadow around the time of Saturn's August 2009 equinox.

The wide Roche Division separates the A ring from the thin F ring in the lower left quarter of the view. This view looks toward the southern, unilluminated side of the rings from about 20 degrees below the ringplane.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 25, 2012. The view was obtained at a distance of approximately 1.2 million miles (2 million kilometers) from Pan. Image scale is 7 miles (12 kilometers) per pixel.

Photo credit: NASA/JPL-Caltech/Space Science Institute

Tuesday, September 11, 2012

B-Ring Clumps and Strands


Zooming in on clumps in Saturn’s B-ring (lower left), the image also spans the ringlets of the Cassini Division towards the A-ring in the top right. The view looks toward the sunlit side of the rings from about 31 degrees below the ring plane. The image scale is approximately 2 km per pixel.

Photo credit: NASA/JPL/Space Science Institute