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Originally Posted by Jarvamundo
Good old NASA news releases aye... heheh
Mike A'hearn: "Those are all chunks of ice.... size of a golf ball, size of a basketball"
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5:50 - "we
think" …
possibly up to the size of a basketball
probably very porous.
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Originally Posted by Jarvamundo
Dr Sunshine: "While they appear to quite large, they are actually quite small.... we are *not* seeing hail sized golf balls.... they are more of a dandelion puff."
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Less than 1 micron .. fluffy aggregates .. (this is from the spectrograph measurements taken from inside the coma). These measurements have an overlay of lab compared particle sizes displayed on the same graph. The graph measurements are clearly more accurate, as they give this size comparison. Ahearn was speculating about particles further out from the immediate surface coma based on optical (longer range, wider angle) photos.
They are saying that there's a completely varying distribution of object sizes (Depending on how far out you look). Pretty reasonable summary from looking at the wider field images. Ice sticks together too, so somewhere further out, you'd expect there'd be more snowball sized blobs.
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Originally Posted by Jarvamundo
what the? that's a pretty big contradiction?
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Not really … when you consider the words which clearly denote speculation (as declared by Ahearn, himself), at this stage of the analysis. Sunshine is basing her statements on the spectrograph readings .. ie: closer range, tighter field of view, higher resolution, thus .. more accurate.
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Originally Posted by Jarvamundo
These bright focal *spots* (not eventually visible columns) on the night side on the nucleus are amazing, wonder why they decided to specifically not cover that feature? Given Emily specifically asked in Q&A1... and was cut off in Q&A2?
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A conspiracy !!
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Originally Posted by Jarvamundo
Mike A'hearn: "We know that ice is between a few inches and a couple of feet below the surface, we know that because we saw that, we excavated it with temple 1"
Sorry, but didn't slamming that projectile into Temple1 make *no change* the to associated-hydroxyl (h20) spectrum?
Also... wasn't surface photographs of Temple1 99.975% *not ice*? (see my other iis thread for those specifics)
I sense a bit of reification here... hmmm
2 different types of comets in 1 aye... hmmm... each comet is different? The model is now way way way more complex, as Ahearn said. Also notice Ahearn touched on the resolution of the spectrometer, saying the resolution of their onboard is pretty poor... said "keck" is better???... so i don't see your desire of actual surface points arc-ing spectro's being possible with this test.
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Don't know about Temple 1 .. I'll leave comments up to others, but it seems to me that you're reading a lot of what you want to hear into what they're actually saying.
Hartley 2 has more frozen CO2 as evidenced from the spectro measurements, which clearly show lots of CO2. This is what differentiates it from Temple 1.
Clearly the onboard (1 to 5 microns) spectro doesn't have to be as sensitive (resolution) as Keck's. After all, Keck is a
lot further away and works in higher bandwidths.
Can you clarify your last question (following the 'dots') ? I'm not sure what you're asking .. I don't have any desires about surface arcs !!! This would be an emission spectrum which would turn up across all bands measured. Its
absent in the measured spectro results !! .. So .. no arcs !!
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Originally Posted by Jarvamundo
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Yeah .. the cut-outs are a bit frustrating !! Why wasn't your mate Emily present at the conference, I ask ???
Cheers