Pluto Surface Observations 3: NH Post-Encounter Phase, 1 Feb 2016- TBD |
Pluto Surface Observations 3: NH Post-Encounter Phase, 1 Feb 2016- TBD |
Jan 30 2016, 07:21 AM
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This topic is for all New Horizons Pluto surface observations received after 1 Feb 2016.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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May 22 2018, 02:57 PM
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Member Group: Members Posts: 120 Joined: 26-May 15 From: Rome - Italy Member No.: 7482 |
I do not know if this is the right place. I watched this Pluto area. What is these like rivers?
nitrogen ice flows? Sputnik planum could be in the past an exposed ocean of liquid Nitrogen as is the case with Titan's methane oceans? can a planet or dwarf planet exist with an exposed ocean of liquid nitrogen? how big must a planet be to have a liquid nitrogen ocean?? Grazie |
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May 22 2018, 04:59 PM
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
I do not know if this is the right place. I watched this Pluto area. What is these like rivers? nitrogen ice flows? Sputnik planum could be in the past an exposed ocean of liquid Nitrogen as is the case with Titan's methane oceans? can a planet or dwarf planet exist with an exposed ocean of liquid nitrogen? how big must a planet be to have a liquid nitrogen ocean?? Grazie Back in 2011, there was a suggestion that rivers of liquid nitrogen might be stable on Pluto http://www.planetary.org/blogs/emily-lakda.../2011/3182.html That was followed up by 2016 announcements that when Pluto's orbit and rotation are just right, Pluto's atmosphere should support an atmosphere thick enough for liquid nitrogen to flow.
QUOTE (http://phenomena.nationalgeographic.com/20...-lake-on-pluto) “The pressure changes radically,” says New Horizons principal investigator Alan Stern. Today, he says, Pluto’s atmospheric pressure is “atypically low,” noting that at maximum it can be more than 20,000 times the current reading. That means surface temperatures must be fluctuating enough to mess with the nitrogen on Pluto’s surface, driving it from a frozen solid into a gas. And sometimes, the temperature and pressure occasionally rise high enough for liquid nitrogen to flow on the surface. The last time temperatures were sufficiently high to melt nitrogen was around 800,000 years ago, when Pluto’s orbital alignment led to its most extreme warm climate, says MIT’s Richard Binzel. |
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May 23 2018, 05:52 PM
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Member Group: Members Posts: 532 Joined: 19-February 05 Member No.: 173 |
See: 1. Past Epochs of Significantly Higher Pressure Atmospheres on Pluto. S.A. Stern, R.P. Binzel, A.M. Earle, K.N. Singer, L.A. Young, H.A. Weaver, C.B. Olkin, K. Ennico, Jeff Moore, William McKinnon, John Spencer, and the New Horizons Geology and Geophysics Investigation Team, Icarus, 2017. https://www.sciencedirect.com/journal/icarus/vol/287
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