Is that what you are reduced to?
Why do you bother?
To be honest, it's not much of a drop from "it looks like X so it must be X".
Is that what you are reduced to?
Why do you bother?
25 June 2015 Sol88: Use a impact calculator to calculate the size of the crater on a comet made of rock by the Deep Impact impactor. Please report the results in your next post....snipped inane image...
!The ignorance, delusions and lies in the Thunderbolts web site, videos etc.Easy, Sol88: You forgot that a mindless obsession with the Thunderbolts delusions hints that your brain forgotten basic facts about the real world!
Cliffs made up of CO, water, etc. ices will recede at their edges as those ices sublimate!
Also a delusion of your own- no one has forgotten about the trivial fact that there are observations about recession of icy cliffs at the margins on Tempel 1 as expected for icy cliffs.
According to EC methodology a la "it looks like bunny", this situation falsifies EC.
LINKThe false colour images are red-green-blue composites assembled from monochrome images taken at different times and have been stretched and slightly saturated to emphasis the contrasts of colour such that dark terrains appear redder and bright regions appear significantly bluer compared with what the human eye would normally see.This imaging technique allows scientists to determine more about the nature of the material; in this case the bluer colour indicates the presence of ice. Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
That are blue in colour!bright patches of exposed ice on the comet’s surface
The false colour images are red-green-blue composites assembled from monochrome images taken at different times and have been stretched and slightly saturated to emphasis the contrasts of colour such that dark terrains appear redder and bright regions appear significantly bluer compared with what the human eye would normally see.
This imaging technique allows scientists to determine more about the nature of the material; in this case the bluer colour indicates the presence of ice.
Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
Using the high-resolution science camera on board ESA’s Rosetta spacecraft, scientists have identified more than a hundred patches of water ice a few metres in size on the surface of Comet 67P/Churyumov-Gerasimenko.
A new study just published in the journal Astronomy & Astrophysics focuses on an analysis of bright patches of exposed ice on the comet’s surface.
Based on observations of the gas emerging from comets, they are known to be rich in ices. As they move closer to the Sun along their orbits, their surfaces are warmed and the ices sublimate into gas, which streams away from the nucleus, dragging along dust particles embedded in the ice to form the coma and tail.
Despite this, Rosetta’s suite of instruments has already detected a variety of gases, including water vapour, carbon dioxide and carbon monoxide, thought to originate from frozen reservoirs below the surface.
In all cases, however, the bright patches were found in areas that receive relatively little solar energy, such as in the shadow of a cliff, and no significant changes were observed between images taken over a period of about a month. Furthermore, they were found to be bluer in colour at visible wavelengths compared with the redder background, consistent with an icy component.
What about the total ignorance of thinking that false color images show the true colors of comets when what you quote specifically states that it does not, Sol88What about blue Bunnies?
...incoherent rant and inane image snipped..
?Clear as glass - it was always idiotic to think that comets were rocks because their density is that of ices and dust as you have known for about 6 years now, Sol88.On the left hand side of the image a boulder with icy patches in Hatmehit (top) a cluster of icy features in Imhotep (middle) and a cluster in Khepry (bottom) is presented; on the right hand side a cluster in Anuket (top), a bright feature in Imhotep and a cluster close to the Khepry-Imhotep boundary (bottom) is shown. The false colour images are red-green-blue composites assembled from monochrome images taken at different times and have been stretched and slightly saturated to emphasis the contrasts of colour such that dark terrains appear redder and bright regions appear significantly bluer compared with what the human eye would normally see. This imaging technique allows scientists to determine more about the nature of the material; in this case the bluer colour indicates the presence of ice.
We have detected ices on comets before (Deep Impact and Tempel 1 was 10 years ago!).
We have detected ices on 67P.
Now we have detected surface water ice on 67P.
Sol, may I suggest you review your replies for unintended irony before you post them?
But that would greatly reduce his entertainment value. His false colour mistake gave me the best laugh I'd had in days.Sol, may I suggest you review your replies for unintended irony before you post them?
Yeah they found trivial ice on Tempel 1 made a big hoohar but forgot about the
[qimg]https://upload.wikimedia.org/wikipedia/commons/4/48/PIA13862_Tempel_1_annotated.jpg[/qimg]
Please explain???
Is that what you are reduced to?
Why do you bother?
This describes Exposed water ice detected on comet’s surface cited before and the newer Comet sinkholes generate jetsComet 67P/C-G may be tiny at just 2.5 miles (4 km) across, but its diverse landscapes and the processes that shape them astound. To say nature packs a lot into small packages is an understatement.
In newly-released images taken by Rosetta’s high-resolution OSIRIS science camera, the comet almost seems alive. Sunlight glints off icy boulders and pancaking sinkholes blast geysers of dust into the surrounding coma.
This story is mirrored from the main ESA web portal and is based on a paper just published in the journal Nature.
A number of the dust jets emerging from Rosetta’s comet can be traced back to active pits that were likely formed by a sudden collapse of the surface. These ‘sinkholes’ are providing a glimpse at the chaotic and diverse interior of the comet.
More real comet science covered in the Universe Today blog:
Rosetta’s Comet Sparkles with Ice, Blows Dust From Sinkholes
This describes Exposed water ice detected on comet’s surface cited before and the newer Comet sinkholes generate jets
For those interested in the plasma around the comet: Niklas Edberg and co-workers have just published a paperSpatial distribution of low-energy plasma around comet 67P/CG from Rosetta measurements. (pay wall, but of course pdfs are easy to get)
So big mobs of debris on the bottom of the sinkhole/pit then?Scientists analysing the images think that the pits are formed when the ceiling of a subsurface cavity becomes too thin to support its own weight and collapses as a sinkhole. This exposes the fractured interior of the comet, allowing otherwise hidden material to sublimate, thus continuing to erode the pit over time.
The pits are a few tens to a few hundreds of metres in diameter and extend up to 210 m below the surface to a smooth dust-covered floor. Material is seen to be streaming from the most active pits.
so we can see the ICE then?“We see jets arising from the fractured areas of the walls inside the pits. These fractures mean that volatiles trapped under the surface can be warmed more easily and subsequently escape into space,” says Jean-Baptiste Vincent
to me!