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SAN FRANCISCO cheap adidas prophere uk , June 5 (Xinhua) -- A team of astronomers has obtained what they say the most detailed radio map yet of the atmosphere of Jupiter, the largest planet in the solar system.
By using the upgraded Karl G. Jansky Very Large Array (VLA) radio astronomy observatory in New Mexico to measure radio emissions from Jupiter's atmosphere in wavelength bands where clouds are transparent, the astronomers have revealed the massive movement of ammonia gas that underlies the colorful bands, spots and whirling clouds visible to the naked eye.
Reporting in the latest issue of the journal Science, published on June 3 cheap adidas deerupt uk , the researchers say they were able to see as deep as 100 kilometers below the cloud tops, as they measured the amount of absorption of thermal radio emissions by ammonia gas.
"We in essence created a three-dimensional picture of ammonia gas in Jupiter's atmosphere, which reveals upward and downward motions within the turbulent atmosphere," said principal author Imke de Pater, a professor of astronomy at University of California cheap adidas superstar uk , Berkeley, adding that the map bears a striking resemblance to visible-light images taken by amateur astronomers and the Hubble Space Telescope.
The observations were made over the entire frequency range between 4 and 18 gigahertz, or wavelength between 1.7 and 7 centimeters. And the spatial resolution of the map, 1,300 kilometers cheap adidas nmd uk , is the best ever achieved.
The map shows ammonia-rich gases rising into and forming the planet's upper cloud layers: an ammonium hydrosulfide cloud at a temperature near 200 degrees Kelvin, or about minus 73 degrees Celsius; and an ammonia-ice cloud in the cold air of about 160 degrees Kelvin, or minus 113 degrees Celsius. It also shows ammonia-poor air sinking into the planet, and ammonia-poor hotspots that encircle the planet like a belt just north of the equator.
"With radio, we can peer through the clouds and see that those hotspots are interleaved with plumes of ammonia rising from deep in the planet cheap adidas shoes free shipping uk , tracing the vertical undulations of an equatorial wave system," said Michael Wong, a UC Berkeley research astronomer and a co-author of the study.
The U.S. National Aeronautics and Space Administration (NASA)'s Juno spacecraft is scheduled to arrive at Jupiter on July 4 and measure the amount of water in the deep atmosphere where the VLA observatory looked for ammonia. Noting that her team will observe Jupiter with the VLA at the same time as Juno's microwave instruments are probing for water, de Pater said "maps like ours can help put their data into the bigger picture of what's happening in Jupiter's atmosphere."
Built in 1973 through 1980 with 27 radio telescopes, each with a 25-meter antenna cheap adidas shoes sale uk , in a Y-shaped array, the VLA observatory received an upgrade that lasted a decade and improved its sensitivity by a factor of 10.
Michelin Tyres is making waves in the ultra high performance (UHP) tyre market with two new super sports tyres designed in conjunction with Ferrari and Porsche and especially developed to be fitted on to high performance supercars from these leading-edge manufacturers. Michelin Tyres has a long history of association with motor sports and high performance, and has developed these exceptional tyres in record time even by the standards of Michelin Tyres.
Working with Ferrari at a number of race tracks, Michelin Tyres helped match the tyres performance with the chassis characteristics of the new Ferrari 599 GTO; Ferrari's fastest road car, with priority placed upon finding the correct balance between safety and optimal track handling. According to Michelin cheap adidas shoes china uk , the new tyres are exceptionally light, which helps to reduce unsprung weight and improve handling as well as helping to reduce fuel consumption and thus carbon emissions. Michelin Tyres also claim a 20% better rolling resistance.
Michelin Tyres has developed three different innovative rubber compounds for Ferrari: a track-type compound on the outer shoulder to withstand the extreme pressure of circuit driving, a centre of the tread compound for superior performance at very high speeds, and an inner shoulder compound that works in combination with the tyre's construction and which Michelin Tyres claim maximises the amount of rubber in contact with the road for surer road-holding.
Michelin Tyres has also launched three new ranges of tyres designed and homologated to fit the new Porsche Cayenne. According to Michelin, the "Porsche Intelligent Performance" strategy of manufacturing vehicles that deliver enhanced performance whilst also consuming less fuel and are therefore more efficient and less polluting cheap adidas shoes wholesale uk , corresponds perfectly with the Michelin Tyres strategy of designing and producing tyres that provide the most balanced performance.
The Michelin Tyres range for Porsche's new SUV is organised around three models namely; the Latitude Tour HP, the Latitude Sport and the Latitude Alpin - a winter tyre designed to deliver the necessary performance on cold roads whether dry, wet, icy or snow-covered. Michelin Tyres' Latitude Sport's tread is designed to resist deformation in order to maintain control of the contact patch at high speed, whilst the Latitude Tour HP cheap adidas shoes uk , also from Michelin Tyres, reduces fuel consumption whilst offering the balanced performance delivered by both summer and winter tyres.
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