Cassini images bizarre hexagon on Saturn
An odd, six-sided, honeycomb-shaped feature circling the entire north pole of Saturn has captured the interest of scientists with the Cassini mission.
This atmospheric feature was already imaged by NASA’s Voyager 1 and 2 spacecraft over two decades ago. The fact that it has appeared in Cassini images indicates that it is a long-lived feature. A second hexagon, significantly darker than the brighter historical feature, is also visible in the Cassini pictures. The spacecraft's visual and infrared mapping spectrometer (VIMS) is the first instrument to capture the entire hexagon feature in one image.
“This is a very strange feature, lying in a precise geometric fashion with six nearly equally straight sides,” said Kevin Baines, atmospheric expert and member of Cassini’s visual and infrared mapping spectrometer (VIMS) team at NASA’s Jet Propulsion Laboratory, Pasadena, California. “We’ve never seen anything like this on any other planet. Indeed, Saturn’s thick atmosphere where circularly-shaped waves and convective cells dominate is perhaps the last place you’d expect to see such a six-sided geometric figure, yet there it is.”
The hexagon is similar to Earth’s polar vortex, which has winds blowing in a circular pattern around the polar region. On Saturn, the vortex has a hexagonal rather than circular shape. The hexagon is nearly 25 000 kilometres across. Nearly four Earths could fit inside it.
The new images taken in thermal-infrared light show the hexagon extends much deeper down into the atmosphere than previously expected, some 100 kilometres below the cloud tops. A system of clouds lies within the hexagon. The clouds appear to be whipping around the hexagon like cars on a racetrack.
“It’s amazing to see such striking differences on opposite ends of Saturn’s poles,” said Bob Brown, team leader of the Cassini VIMS instrument, University of Arizona, Tucson. “At the south pole we have what appears to be a hurricane with a giant eye, and at the north pole of Saturn we have this geometric feature, which is completely different.”
The Saturn north pole hexagon has not been visible to Cassini’s visual cameras, because it’s winter in that area, so the hexagon is under the cover of the long polar night, which lasts about 15 years. The infrared mapping spectrometer can image Saturn in both daytime and nighttime conditions and see deep inside. It imaged the feature with thermal wavelengths near 5 microns (seven times the wavelength visible to the human eye) during a 12-day period beginning on 30 October 2006. As winter wanes over the next two years, the feature may become visible to the visual cameras.
“Through the use of different wavelengths, the VIMS instrument is able to probe Saturn’s atmosphere at different depths,” says Angioletta Coradini, from the Istituto di Fisica dello Spazio Interplanetario by INAF (Italy), and member of the VIMS team. “Thanks to the VIMS measurements we can link together atmospheric structures – such as the hexagonal vortex – with the energetic balance of the planet’s upper atmosphere,” she continued. “With this series of investigations – the very first ever performed at Saturn – we are obtaining vital information to understand the atmospheric dynamics of giant planets in general.”
Based on the new images and more information on the depth of the hexagonal feature on Saturn, scientists think it is not linked to Saturn’s radio emissions or to auroral activity, as once contemplated, even though Saturn’s northern aurora lies nearly overhead. So, there is still plenty to do for the scientists to solve the puzzle.
“This will be possible thanks to the exceptional capability of instruments of this kind in probing planetary atmospheres and following their evolution with time, in a true ‘3D’ way,” added Coradini. “As a comparison, it is a similar instrument (VIRTIS) sitting on board ESA’s Venus Express, that is providing the most detailed view ever of Venus’ double-eyed south-polar vortex on Venus.”
Saturn's 'hexagon' appears to have remained fixed with the planet’s rotation rate and axis since first glimpsed by Voyager 26 years ago. The actual rotation rate of Saturn is still uncertain. “Once we understand its dynamical nature, this long-lived, deep-seated polar hexagon may give us a clue to the true rotation rate of the deep atmosphere and perhaps the interior,” concluded Baines.
Article from: http://www.esa.int/SPECIALS/Cassini-
Liquid Water on Enceladus - The Source of Saturns rings?
Blue Rings Pose New Mystery
Saturn’s Monstrous Polar Storm
The Saturn Theory (pdf)
Frequency Fields at the Cellular Level
Evolution linked to Spiritual Renaissance: DNA Called “Antennae to God” (See Hexagon)
Latest News from our Front Page
4 beheaded in Saudi Arabia less than a week into King Salman's rule
Comment: So when will the the "Human rights" promoting liberal west elite decide invade Saudi Arabia like they did Libya?
Members of Magic Movement stage a mock execution scene in protest of Saudi Arabia beheading of eight Bangladeshi workers in October 2011.
Four people have been executed in Saudi Arabia less than a week after 79-year-old King Salman assumed power following the ...
Swedish Office Block Pushes Microchips on its Staff
Sweden is heading over the cliff in multiple areas, all at once. They are pushing the abolition of cash, run amok state feminism, gender war, pacification of the police and perhaps even more frightening: open borders. A policy that have given the country a "gold medal" in asylum seeker acceptance. Run away
Charlie Hebdo: Where Neocons, Zionists, Masons and Communists Converge
Charlie Hebdo, raising the banner of revolt, has always regurgitated precisely what the “system” required.
Charlie Hebdo (CH) came out of the New Left milieu of the 1960s and is a product of the 1968 revolt against President Charles de Gaulle. It happens that the most famous of the New Left revolts came at a time when (1) the CIA was ...
The Liberation of Auschwitz
This article is perhaps a day late, but it will be some time before talk of the Holocaust subsides in the mainstream press, especially now that we are to have a vast new Holocaust Memorial Centre built with £50 million of taxpayers money in central London, to replace the rather unimpressive one that already exists in Hyde Park.
In the various ...
Facebook’s New ‘Chinese-style’ Political Censorship System Goes Global
Last week 21WIRE reported on Facebook’s new communitarian policy whereby readers can ‘flag’ content as “fake news” if they believe it’s not real, or if they do not like it. In the wake of the Charlie Hebdo False Flag event, the social media giant is now allowing governments to determine what is ‘good free speech’, and what is not.
“An article ...
|More News » |