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Go Back   IceInSpace > General Astronomy > Celestial and Astronomical Events

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  #41  
Old 19-06-2015, 04:04 PM
geolindon (Lindon)
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Thanks Hugh,

The second link is an awesome pic.

To me it looks like a bright newer crater, but also notice a couple of small really dark spots. One at top left appears to be at the apex of a pale V, the other smaller and darker one is below it about level with the bright crater, and another to that's lower right. Any ideas wot they might be? Carbon rich patches?? from asteroid fragments?? dust spots on the lense? caves??

Also I get the impression the overall surface texture is like a frozen snowball??

Cheers, L
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  #42  
Old 19-06-2015, 11:58 PM
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Not sure if anyone's mentioned this.. but the conical mountain is certainly quite odd and seems out of place. Appears to be around 6 km high and has already made an appearance on wiki under the heading "The Great Pyramid of Ceres"
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  #43  
Old 20-06-2015, 04:36 PM
geolindon (Lindon)
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Nice pick up Col

And the link seems the best resolved pic on various sites.

It's tempting to link the bright side of the mount with the fresh crater i.e. ejecta from the impact coated the mtn; but in doubt that's the case cos there is no ejecta in between them.

My two Bob would be on it being a cryovolcano, n that's a bit exciting

Cheers, L
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  #44  
Old 23-06-2015, 05:36 PM
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multiweb (Marc)
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Bright spots latest

Link here: http://www.jpl.nasa.gov/spaceimages/...hp?id=PIA19579
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  #45  
Old 28-08-2015, 02:20 PM
geolindon (Lindon)
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Dawn sends sharper scenes from Ceres 26/8/15

http://www.nasa.gov/mission_pages/dawn/main/index.html

including the 6 km high bright ??ice mountain.

my 2 bob;
an inactive cryo volcano with sun melt on the bright side and 3 recent craters - at 9 o'clock at the base of the mtn, at 9.30 near the summit and at 2 off the mountain. possibly some smaller fresh craters.

inactive because the summit is dark - carbon complexes dust?

the cratered dark side must be shaded by the mtn during 9 hour rotation and 4.6 year orbit?

the melt is brightest from 9 to 11 and the rest stretches back to 4 o'clock so a solstice must be near?

good fun

cheers, L

Last edited by geolindon; 28-08-2015 at 03:41 PM.
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  #46  
Old 28-08-2015, 10:12 PM
Rob_K
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Quote:
Originally Posted by geolindon View Post

my 2 bob;
an inactive cryo volcano with sun melt on the bright side and 3 recent craters - at 9 o'clock at the base of the mtn, at 9.30 near the summit and at 2 off the mountain. possibly some smaller fresh craters.
It's pretty obvious what it is, the biggest freakin' limpet in the whole Solar System. Just hope this bad boy doesn't ever get to Earth, can you imagine the size of the screwdriver you'd need to prise it loose?

Cheers -
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  #47  
Old 14-09-2015, 07:21 AM
geolindon (Lindon)
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On d other hand

I am perplexed and intrigued by this mountain.
It looks remarkably similar to the glaciated mountains on Pluto.
But no evidence of glaciation nearnthis mtn. ? ?
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  #48  
Old 16-09-2015, 10:22 AM
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ZeroID (Brent)
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Almost like its erupted out of the surface as a whole, maybe it's a pimple ... Mt Pimple .. I like it !!

On a slightly more serious note, re ejecta conumdrum. Gravity on Ceres is damn all of bugga little so it could be thrown off into space and never fall back to leave a scar or so little it's not noticeable.
Just thinking aloud ...
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  #49  
Old 10-12-2015, 12:07 PM
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Strange bright spots on the dwarf planet Ceres are giant salt pans caused by the evaporation of water from a subsurface ocean, scientists have confirmed.

http://www.abc.net.au/news/2015-12-1...n-data/7014134
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  #50  
Old 10-12-2015, 12:44 PM
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Mystery solved!
Thanks for posting
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  #51  
Old 08-03-2016, 08:57 AM
geolindon (Lindon)
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cool new pics/perspectives

On NASA's site this morning an article on Ahuna Mons aka; Mt Pimple; Limpet; Ceres' Pyramid.
After a year's worth of data from Dawn in lowering orbit producing much more detail, the mountain's origins are still not understood.

http://www.nasa.gov/feature/jpl/dawn...untain-emerges
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  #52  
Old 31-03-2016, 10:22 PM
geolindon (Lindon)
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Emily Lakdawalla has post an Planetary Society blog with latest Dawn close-ups of Ceres, especially of Occator crater and "The Bright Spots".

http://www.planetary.org/blogs/emily...uch-ceres.html
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  #53  
Old 16-03-2017, 09:04 PM
geolindon (Lindon)
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"Bright Mound on Ceres Due to Briny Eruptions?"

the latest on Ceres' bright spots;

http://www.skyandtelescope.com/astro...iny-eruptions/

"Occator was gouged into the landscape about 34 million years ago, but the whitish dome at its center is much younger just 4 million years old. That's the conclusion of a new analysis published in this month's Astronomical Journal by Andreas Nathues (Max Planck Institute for Solar System Research) and nine colleagues."
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