NASA’s Cassini spacecraft has provided scientists the first close-up, visible-light views of a behemoth hurricane swirling around Saturn’s north pole.
In high-resolution pictures and video, scientists see the hurricane’s eye is about 1,250 miles (2,000 kilometers) wide, 20 times larger than the average hurricane eye on Earth. Thin, bright clouds at the outer edge of the hurricane are traveling 330 mph(150 meters per second). The hurricane swirls inside a large, mysterious, six-sided weather pattern known as the hexagon.
“We did a double take when we saw this vortex because it looks so much like a hurricane on Earth,” said Andrew Ingersoll, a Cassini imaging team member at the California Institute of Technology in Pasadena. “But there it is at Saturn, on a much larger scale, and it is somehow getting by on the small amounts of water vapor in Saturn’s hydrogen atmosphere.”
Scientists will be studying the hurricane to gain insight into hurricanes on Earth, which feed off warm ocean water. Although there is no body of water close to these clouds high in Saturn’s atmosphere, learning how these Saturnian storms use water vapor could tell scientists more about how terrestrial hurricanes are generated and sustained.
Both a terrestrial hurricane and Saturn’s north polar vortex have a central eye with no clouds or very low clouds. Other similar features include high clouds forming an eye wall, other high clouds spiraling around the eye, and a counter-clockwise spin in the northern hemisphere.
NASA has big plans to improve detection and characterization of asteroids.
The agency plans to develop a mechanism to capture an asteroid and redirect it to a stable orbit in the Earth-moon system, and begin designing a mission to send humans to it using the Space Launch System rocket and Orion spacecraft.
1) Diet sodas raised the risk of diabetes more than sugar-sweetened sodas. 2) Women who drank one 12-ounce diet soda had a 33 percent increased risk of type 2 diabetes and women who drank one 20-ounce soda had a 66 percent increased risk. 3) Women who drank diet sodas drank twice as much as those who drank sugar- sweetened sodas because artificial sweeteners are more addictive and are hundreds to thousands of times sweeter than regular sugar. 4) The average diet soda drinker consumes 3 diet drinks a day.