“NASA’s Voyager 1 and 2 spacecraft imaged the feature 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 is the first instrument to capture the entire hexagon feature in one image.”
I thought that is really interesting so I’ve post it here. Enjoy!
Source: http://www.sciencedaily.com/releases/2007/03/070327121941.htmÂ
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