I got bored today do deided to hunt down the quote
Why clouds don’t collapse on their own is still a ‘great mystery’.
The quote originally comes from this site
Accretion hypothesis - creation.com
The full phrase which is bounded by quotation marks is
In other words, The general model requires some mechanism to trigger a cloud’s collapse: a supernova explosion, a shock wave from the galaxy’s spiral arms, cloud collisions, or stellar winds. Why clouds don’t collapse on their own is still a ‘great mystery’.50
50 refers to the reference the quote is obtained from. Reference 50 is given as Edelson, ref. 44, p. 12. Reference 44 is given as Edelson, E., Astrochemistry comes of age, Mosaic 10(1):9—14, 1979; p. 13.
So I found the full reference 44 online,
Forbidden
On page 12 it says
[qs]The general model requires
some mechanism to trigger a cloud's
collapse: a supernova explosion, a shock
wave from the galaxy's spiral arms, cloud
collisions or stellar winds. Why clouds
don't collapse on their own, muses
Scoville, is still "a great mystery."
Scoville is Nicholas Scoville of University of Massachusetts. There is no reference given for this quote from Scoville in Edelson's article. Edelson was a science journalist in the1970s.
I haven't checked out any of the other quotes which contain ellipses cos I'm no longer bored, but it passed an entertaining 10 minutes.