Saturday, July 25, 2015

New photos of Pluto: stratus 130 km and glaciers moving – Il Sole 24 Ore

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This article was published on July 25, 2015 at 16:31.
The last change is the July 25, 2015 at 19:11.

Here are the new pictures of Pluto taken by the probe New Horizons, the first color. Made about 450 thousand kilometers, stunned by its quality both fans that NASA scientists who have the opportunity to discover new details. According to their calculations, in fact, the estimated temperature of the dwarf planet was to allow the formation of haze is not higher than 30 kilometers.

The photo shows a rather glowing silhouettes reminiscent almost an aura consisting of two layers of mist, one closer to the surface, about 80 kilometers high, and one above, that would extend for another 50 kilometers. “Now we have to find new ideas to explain what is really going on up there,” said Michael Summers, of George Mason University in Virginia. The mist, much higher than expected, it would be produced by the sun’s ultraviolet rays that break the molecules of methane gas in the atmosphere of the dwarf planet.

The other incredible surprise comes from the close-up images that tell in detail the surface of the plain ice Sputnik. Here, along the western edge of the famous region at heart, are clearly visible moving glaciers high in nitrogen, carbon monoxide and methane. “Surfaces like we have seen only on active planets, like Earth and Mars, I’m really smiling,” said John Spencer of the Southwest Research Institute. More close-up images and colors of Pluto (used to deduce the composition of its surface) show that at the equator regions are darker in color, while in the region of the North Pole is an expanse of ice clearer: in the midst of colors They are gradually degrading. According to the researchers, this design might be the result of seasonal movement of the ice from the equator toward the poles.



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