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kosmos: Great White Spot
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The Great White Spot, also known as Great White Oval (named by analogy to Jupiter's Great Red Spot) is a series of periodic storms on the planet Saturn that are large enough to be visible from Earth by telescope by their characteristic white appearance. The spots can be several thousands of kilometers wide. The Cassini orbiter was able to track the 2010–11 instance of the storm, also known as the Northern Electrostatic Disturbance, because of an increase in radio and plasma interference, or the Great Springtime Storm. Cassini data has revealed a loss of acetylene in the white clouds, an increase of phosphine, and an unusual temperature drop in the center of the storm. After the visible aspe…
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Adaptive spectropolarimetric imaging from the Cassini orbiter. Ambitious objectives for the NASA/ESA Cassini orbiter/Titan probe mission to the saturnian system include the determination of composition and distribution of material within rings, on satellite surfaces, and within the atmospheres of Saturn and Titan. Dynamic processes which lead to spatial and temporal variations are also to be investigated. Known materials include hydrogen, methane, ammonia, phosphine, germane, and carbon monoxide for Saturn; nitrogen, methane, and higher hydrocarbons for Titan; and water and possibly ammonia ice for the other satellites and rings. Within atmospheres, ammonia (for Saturn) and methane (for Tit…
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