Post Vintage (293): Pluto, the world that leaves you KO
Post Vintage (293): Pluto, the world that leaves you KO
Lakes and rivers of Liquid Nitrogen in recent times?
The in-depth study of all the information received by the New Horizons continues to bear fruit, revealing more facets of this small great world, whose extraordinary complexity continues to amaze astronomers. And do not let that increase that feeling. Were there rivers and lakes? As incredible as it turns out, not a few now believe that it is. And not only that, they existed until recent times. "What the data revealed did not surprise us"Says Jim Green, director of NASA's planetary division. "It shocked us" In fact it has been doing since that far July 4, 2015.
Rivers and lakes in Pluto? How is it possible? We would be talking about water, obviously, but possibly Liquid Nitrogen. Still, it is inconceivable, at least as are the environmental conditions of this small world. But the scientists of the New Horizons they are quite sure that they have found signs of the flow of "the waters" on their surface, with a network of what appear to be ancient river courses, and especially with something that can not be described otherwise as an ancient lake now frozen. Again the question arises. As it is possible, if at current temperatures and atmospheric pressures it is not possible for Nitrogen to exist in a liquid state? The inevitable answer is that not now, but in the past the conditions may have been different, with higher temperatures and higher atmospheric pressure.
And that kind of situations are not only possible, but could well be repeated in the future, having coincided our arrival with a moment where Pluto It is located at the bottom of the valley, between two warmer eras and a greater atmosphere. It was in the past, it will be again in the future.
The explanation for all this is found in the orbital and rotational characteristics of Pluto, where an axis of rotation inclined 120º and an extremely elliptical orbit is combined. In the land the difference between the Afelio and the Perihelion is small, and its effect on the climate, equally insignificant. But in the case of this small dwarf planet, the difference is enormous (even closer to the Sun what Neptune during 20 Earth years of the 248 that its year lasts), and with it the amount of light and solar heat received. That means that on your trip you experience some of the most extreme seasonal changes in the Solar System. To the point that it experiences two Summers and two Winters, the one caused by the inclination of its axis and the one that is born of the increase and decrease of the distance to the Sun. Some zones directly live periods of 50 years of complete darkness and 50 years of light keep going. It is chaos personified.
When all the factors converge, Pluto It can change drastically. When scientists simulated these seasonal changes over millions of years, also taking into account that the inclination of the axis also tilts with time, they realized that its atmosphere was suffering spectacular increases in its density. Up to 20,000 times more than the current one. Even superior to that of Mars. That means a temperature and pressure high enough for the NLiquid oxygen reaches the surface. Actually we do not know, if it was precisely this element the responsible, but seeing the composition of the
surface and atmosphere, seems the most plausible option. Other
Possibilities include Neon, Molecular Oxygen, or Molecular Helium,
although it does not seem likely since they are not present in quantities
enough
And maybe not so long ago, since the models indicate that the last time was only 800,000 years ago, yesterday on a cosmic scale. Now we would be, therefore, before a Pluto which is in an intermediate phase between two climatic extremes.
He had Pluto rivers and lakes crossing the surface, even in very short periods of time, and will have them again in the future? Or are there other plausible explanations for these geological features, such as the advance and retreat of the glaciers, following the rhythm marked by these extreme climatic cycles? We may never know, and it remains another of the enigmas of Pluto, the world that insisted on systematically destroying our forecasts and surprising us again and again. Or as Jim Green said, shock us.
Perhaps the most enigmatic structure of all, which is very difficult to see as anything other than a frozen lake.
The main geological formations that have given the members of the New Horizons scientific team the basis for this extraordinary theory.
Pluto has such an exaggerated inclination and an elliptical orbit that its stations are the personified case, to the point that some regions are, at the same time, tropical and polar. A storm of extreme situations that from time to time can converge in a warmer world with a denser atmosphere, and perhaps rivers of nitrogen on the surface.
Bluish atmosphere, glaciers, winds, volcanoes, polar ice caps, clouds, tropical areas that are also polar ... and now maybe ancient lakes and rivers. Too much to assimilate everything at once.
Is That a Frozen Lake on Pluto?
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