http://www.nasa.gov/mission_pages/cassini/whycassini/dimmer-switch.html
This is NASA's official website.I have been interested in the universe since I was a little. That is why this is my favorite site. We can see what NASA is doing now or the latest information. In addition, fine pictures and images make us understand clearly.This is the information released yesterday.
Like a cosmic light bulb on a dimmer switch, Saturn emitted gradually less energy each year from 2005 to 2009, according to observations by NASA’s Cassini spacecraft. But unlike an ordinary bulb, Saturn's southern hemisphere consistently emitted more energy than its northern one. On top of that, energy levels changed with the seasons and differed from the last time a spacecraft visited in the early 1980s. These never-before-seen trends came from an analysis of comprehensive data from the Composite Infrared Spectrometer (CIRS), an instrument built by NASA's Goddard Space Flight Center in Greenbelt, Md., as well as a comparison with earlier data from NASA's Voyager spacecraft. When combined with information about the energy coming to Saturn from the sun, the results could help scientists understand the nature of Saturn's internal heat source.
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By understanding what is happening on Saturn, we may be able to make it clear deeply how the structure of other planets is ! If you want to know details, please access!
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