"we know for sure..."

I'm sure they don't.

"we know for sure..."

I'm sure they don't.

Err, yes they do. It is too cold out there for water ice to sublimate. Therefore it has to be something with a much lower sublimation temperature, such as CO and CO2.

"K2 is so far from the Sun and so cold, we know for sure that the activity—all the fuzzy stuff making it look like a comet—is not produced, as in other comets, by the evaporation of water ice,"

Oops, theory of cometary comas falsified unless something "dark" is responsible.

"Instead, we think the activity is due to the sublimation [a solid changing directly into a gas] of super-volatiles

There it is, something "dark".

"K2 is so far from the Sun and so cold, we know for sure that the activity—all the fuzzy stuff making it look like a comet—is not produced, as in other comets, by the evaporation of water ice,"

Oops, theory of cometary comas falsified unless something "dark" is responsible.

"Instead, we think the activity is due to the sublimation [a solid changing directly into a gas] of super-volatiles

There it is, something "dark".

Complete rubbish, as usual. Nothing is falsified when we have seen those gases at other comets. Including 67P recently. CO2

.......I was going to mention (b4 my browser had a hiccup) that CO was detected at Hale-Bopp, in 1995, at ~ 7 AU: http://europepmc..../8600385
It isn't the only such observation, either. So hardly anything "dark" when we've known this for over 2 decades, eh?

And, just to add to the above - this comet was at ~ 16 AU. Hale-Bopp was observed to be outgassing CO at 14 AU.
https://www.resea...ngth.pdf

Jewitt suggests that sunlight is heating frozen volatile gases - such as oxygen . . . that coat the comet's frigid surface."

"I think these volatiles are spread all through K2, and in the beginning billions of years ago, they were probably all through every comet presently in the Oort Cloud"

I think he is right, so I have to wonder just how much oxygen ice is still out there, given that oxygen is the third most common element in the galaxy.

"we know for sure..."

I'm sure they don't.

That does it. I've had enough of this shit. And this crap site for suborning it.

En garde.