Electrical Storm on Saturn's Upper Troposphere (approx. true colors; credits: NASA)

Caption NASA:"It is no Great Red Spot, but these two side-by-side views show the longest-lived electrical storm yet observed on Saturn by NASA's Cassini Spacecraft.
The views were acquired more than 3 months after the storm was first detected from its lightning-produced radio discharges on Nov. 27, 2007.
Cassini imaging scientists believe the storm to be a vertically extended disturbance that penetrates from Saturn's Lower to Upper Troposphere.

The view at left was created by combining images taken using red, green and blue spectral filters, and shows Saturn in colors that approximate what the human eye would see. The storm stands out with greater clarity in the sharpened, enhanced color view at right. This view combines images taken in infrared, green and violet light at 939, 567 and 420 nanometers respectively and represents an expansion of the wavelength region of the electromagnetic spectrum visible to human eyes. This view looks toward the un-illuminated side of the Rings from about 3° above the Ring-Plane.
Janus (about 181 Km, or approx. 113 miles across) appears as a dark speck just beneath the Rings in both images.

These images were obtained with the Cassini spacecraft wide-angle camera on March 4, 2008, at a distance of approx. 1,3 MKM (about 800.000 miles) from Saturn.
Image scale is roughly 74 Km (about 46 miles) per pixel".