Re: So...
"If we have 10x the mass of matter, that would mean the gravity would (given current theory) certainly cause universal deceleration and gravitational collapse producing the inevitable big crunchie."
It depends upon whether this increases the overall density of matter in the universe. The article says "there must be a further 90 percent of galaxies in the observable universe that are too faint and too far away to be seen with present-day telescopes.” (my emphasis)
What is slightly unclear about that is that in the context of the observable universe 'too faint' == 'too far away'. Given that we know the resolving power of the telescopes we currently have, we already know that there should be a large number of galaxies that we can't see, and current estimates of the overall density will take this in to account.
Making things more complicated though, is that we're also looking back in time, which should mean that there should be many more smaller galaxies and very few large galaxies, simply because, at the time we are seeing, there shouldn't have been enough time for large galaxies to form. So although the overall density throughout the universe should be roughly the same everywhere, we wouldn't be able to see that same amount of matter at extreme distances because that matter is bound up in lots of small galaxies that are currently too faint to see.
The James Webb telescope is to operate primarily in the Infra Red, which should allow it to see both fainter objects and further back in time.
Biting the hand that feeds IT
