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marsbug
2014-Mar-27, 09:40 AM
A report from the planetary society (http://www.planetary.org/blogs/emily-lakdawalla/2014/lpsc-2014-water-on-vesta.html)on the idea that Vesta, of ll places, might have had near surface liquid water.

Noclevername
2014-Mar-27, 11:03 AM
Can you provide a link or citation of this report?

cjameshuff
2014-Mar-27, 11:27 AM
This?
http://www.planetary.org/blogs/emily-lakdawalla/2014/lpsc-2014-water-on-vesta.html

marsbug
2014-Mar-27, 12:51 PM
Arrgh! I'm very sorry I posted in a hurry. Yes, that's the link I should have/meant to have included. Here's the LPSC abstract. (http://www.hou.usra.edu/meetings/lpsc2014/pdf/1796.pdf)

While, slam dunk, it's an unlikely explanation it's also a very interesting idea. If it panned out it would mean we'd need to take a second look at a lot of our ideas on the geology of small airless bodies.

slang
2014-Mar-27, 11:46 PM
Wow, if that pans out, we better get there real quick, all the water is evaporating!

marsbug
2014-Mar-28, 02:08 PM
Hmm, a lot of things get lost in forum messaging. I don't have a citation for this right now but I'm 99% sure it's been convincingly shown that water ice would be pretty stable and long lived in the Vestan subsurface, barring a hit from a meteorite. But yes, any water that melted and flowed onto the surface would be simultaneously evaporating and freezing. So yes and no. I feel like I've missed something.......

Actually... could fluidized mix of some evaporated volatile and dust (H2O, CO2 etc) behave the same way as water and carve such gullies? A bit like a pyroclastic flow? Impact heat results in fast moving vapour cloud plus dust that carves similar gullies to a fluid flow?