Ceres Geology |
Ceres Geology |
Mar 17 2016, 12:06 PM
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#46
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
From Science Daily website:
https://www.sciencedaily.com/releases/2016/...60316082727.htm |
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Dec 17 2016, 02:47 PM
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#47
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
Polar ice found on Ceres, if this ice is trapped there after outgassing of Ceres itself is not clearly stated on this page from Max Planck institute, though I have a hunch it might be the case.
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Jan 23 2017, 02:57 AM
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#48
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Member Group: Members Posts: 316 Joined: 1-October 06 Member No.: 1206 |
Haze at Occator crater
on dwarf planet Ceres https://arxiv.org/ftp/arxiv/papers/1701/1701.05812.pdf p |
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Jan 31 2017, 04:33 PM
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#49
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Junior Member Group: Members Posts: 52 Joined: 16-November 06 Member No.: 1364 |
I examined the original haze claim and found it to be complete nonsense:
https://arxiv.org/abs/1701.08550 |
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Feb 1 2017, 10:37 AM
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#50
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Thanks for posting that here. Figure 15 on page 40 of the PDF version you linked to gives the clearest picture I've seen of the central white spot in Occator crater. (For anyone tempted to stop at the abstract or just skim the less technical parts of the conclusions I would say: don't miss the illustrations in that paper!)
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Mar 7 2017, 09:57 PM
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#51
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Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
Some Dawn scientists think that the dome in the centre of Occator is a cryovolcanic feature about 4 million years old (Occator itself is stated as being 34 million years old), and that at this point, it cannot be ruled out that cryovolcanic activity is still present at a lower level. The haze interpretation is also doubled down on, and it is mentioned that it could be possible evidence for ongoing activity.
QUOTE "The age and appearance of the material surrounding the bright dome indicate that Cerealia Facula was formed by a recurring, eruptive process, which also hurled material into more outward regions of the central pit”, says Nathues. "A single eruptive event is rather unlikely," he adds. A look into the Jupiter system supports this theory. The moons Callisto and Ganymede show similar domes. Researchers interpret them as volcanic deposits and thus as signs of cryovolcanism. The MPS scientists assume that a similar process is active on Ceres. "The large impact that tore the giant Occator crater into the surface of the dwarf planet must have originally started everything and triggered the later cryovolcanic activity," says Nathues. Following the disruption of the impact, the brine researchers suspect either as a complete layer or as scattered patches under the rocky mantel was able to move closer to the surface. The lower pressure allowed water and dissolved gases, such as methane and carbon dioxide, to escape forming a system of vents. At the surface, fractures appeared through which the saturated solution erupted from the depth. The deposited salts gradually formed the present dome. http://www.mps.mpg.de/Cryovolcanism-on-Dwarf-Planet-Ceres -------------------- |
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Mar 8 2017, 01:11 AM
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#52
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
By studying the domes and bright areas at Occator scientists at Max Planck Institute, Institut für Endlagerforschung & University of Winnipeg have found signs hinting of an subsurface ocean or reservoir containing brine water with dissolved CO2 and methane.
Evolution of Occator crater on Ceres. Edit: This is the actual paper, I did only see Danieles post above but when double check on my post now noted that Habukaz have posted the pressrelease. |
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Mar 10 2017, 02:46 AM
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#53
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Member Group: Members Posts: 401 Joined: 5-January 07 From: Manchester England Member No.: 1563 |
Some Dawn scientists think that the dome in the centre of Occator is a cryovolcanic feature about 4 million years old (Occator itself is stated as being 34 million years old), and that at this point, it cannot be ruled out that cryovolcanic activity is still present at a lower level. The haze interpretation is also doubled down on, and it is mentioned that it could be possibly be evidence for ongoing activity. http://www.mps.mpg.de/Cryovolcanism-on-Dwarf-Planet-Ceres 4 million years is geologically recent, but would it be recent nough to imply suburface cryolava present today? -------------------- |
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Mar 10 2017, 12:31 PM
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#54
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Member Group: Members Posts: 120 Joined: 26-May 15 From: Rome - Italy Member No.: 7482 |
By studying the domes and bright areas at Occator scientists at Max Planck Institute, Institut für Endlagerforschung & University of Winnipeg have found signs hinting of an subsurface ocean or reservoir containing brine water with dissolved CO2 and methane. Evolution of Occator crater on Ceres. Edit: This is the actual paper, I did only see Danieles post above but when double check on my post now noted that Habukaz have posted the pressrelease. Glad to see that my hypothesis of June 5, 2015 was the same or like to recent work :-) |
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Apr 8 2017, 01:18 PM
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#55
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
Transient exosphere found at Ceres.
And the solar wind turned out to be the explanation for it being there at times and then not. |
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Oct 26 2017, 05:16 PM
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#56
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Member Group: Members Posts: 716 Joined: 3-January 08 Member No.: 3995 |
Ceres gravity map:
https://photojournal.jpl.nasa.gov/catalog/PIA22083 Interestingly, Ahuna Mons is centered on the highest (indicated) gravity anomaly, while Occator is in the lowest. |
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Oct 26 2017, 09:01 PM
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#57
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
And following-up on that: https://solarsystem.nasa.gov/news/2017/10/2...mnants-at-ceres
We might have yet another ancient ocean world! Not bad, Dawn! |
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Oct 27 2017, 01:50 PM
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#58
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
The papers start to pile up high enough to build another launch tower for a Ceres mission.
This one conclude that organics on the surface might be native to Ceres after all. |
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Oct 27 2017, 02:30 PM
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#59
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
And following-up on that: https://solarsystem.nasa.gov/news/2017/10/2...mnants-at-ceres We might have yet another ancient ocean world! Not bad, Dawn! That's becoming common eh?
Aug. 11, 2016 NASA Climate Modeling Suggests Venus May Have Been Habitable https://www.nasa.gov/feature/goddard/2016/n...-been-habitable Earth. Yes. Moon? Oct. 19, 2017 An Atmosphere Around the Moon? NASA Research Suggests Significant Atmosphere in Lunar Past and Possible Source of Lunar Water https://www.nasa.gov/centers/marshall/news/...lunar-past.html Mars? March 5, 2015 NASA Research Suggests Mars Once Had More Water Than Earth’s Arctic Ocean https://www.nasa.gov/press/2015/march/nasa-...-s-arctic-ocean Ceres? |
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Dec 6 2017, 06:31 AM
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#60
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Member Group: Members Posts: 316 Joined: 1-October 06 Member No.: 1206 |
Is this a joke?
https://arxiv.org/ftp/arxiv/papers/1712/1712.01320.pdf I get that its a preprint archive and all that, but....sheesh P |
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