This is Hugh.
Posted on 12/15/2016 7:22:57 PM PST by BenLurkin
Dawn’s Gamma Ray and Neutron Detector (GRaND) determined the concentrations of hydrogen, iron and potassium in Ceres crust. In so doing, it was able to place constraints on the planet’s ice content, and how the surface was likely altered by liquid water in Ceres’ interior.
In short, the GRaND instrument detected high levels of hydrogen in Ceres’ uppermost structure (10% by weight), which appeared most prominently around the mid-latitudes. These readings were consistent with broad expanses of water ice. The GRaND data also showed that rather than consisting of a solid ice layer, the ice was likely to take the form of a porous mixture of rocky materials (in which ice fills the pores).
Previously, ice was thought to only exist within certain cratered regions on Ceres, and was thought to be the result of impacts that deposited water ice over the course of Ceres’ long history. But as Thomas Prettyman – the principal investigator of Dawn’s GRaND instrument – said in a NASA press release...
“On Ceres, ice is not just localized to a few craters. It’s everywhere, and nearer to the surface with higher latitudes. These results confirm predictions made nearly three decades ago that ice can survive for billions of years just beneath the surface of Ceres. The evidence strengthens the case for the presence of near-surface water ice on other main belt asteroids.”
The concentrations of iron, potassium and carbon detected by the GRaND instrument also supports the theory that Ceres’ surface was altered by liquid water in the interior. Basically, scientists theorize that the decay of radioactive elements within Ceres created enough heat to cause the protoplanet’s structure to differentiate between a rocky interior and icy outer shell – which also allowed minerals like those observed to be deposited in the surface.
(Excerpt) Read more at universetoday.com ...
Water they gonna do with that information?
I wonder if that ‘salt’ stuff is edible, what it would taste like.
This is Hugh.
There seems to be a lot of water on other bodies in space...
Nice. Thank you!
Anytime ...
Been there. Done that. Stay off my asteroid! ;^)
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