That was very interesting, and I only have one major question after reading it. The article states that it's believed the comet's spin is essentially flinging away chunks, but I'm not clear on the cause of the spinning. The article makes it sound like that starts to occur as it approaches the Sun, so is it a result of a jet of sublimating ice what started this spin, or was it intrinsic from the comet's early formation?
If it's the latter, why is it only starting to fragment now?
> The article makes it sound like that starts to occur as it approaches the Sun, so is it a result of a jet of sublimating ice what started this spin, or was it intrinsic from the comet's early formation?
My reading of this part of the article suggests they think the former might play a role:
>> Based on the Hubble data, the research team suggests that sunlight heated the surface of the comet, causing it to expel jets of dust and gas. Because the nucleus is so small, these jets act like rocket engines, spinning up the comet’s rotation, Jewitt said.
That said, it could be a bit of Column A, a bit of Column B type situation?
> If it's the latter, why is it only starting to fragment now?
The sun could be weakening bonds of ice, to the point where they're weaker than the preexisting centrifugal forces. I know many (all?) materials start to lose their strength as they approach their melting points... it seems to me that either the bonds must weaken, or the forces opposing those bonds must strengthen or spike...
If it's the latter, why is it only starting to fragment now?