posted on Mar, 1 2005 @ 03:55 PM
Originally posted by apc
Galaxies are moving away from eachother. I haven't read anything about the dynamics of our galaxy, but I would think if anything it is very very
very slowly collapsing in spurts... whenever the black hole at the core goes active and starts sucking up the surrounding stars until it once again
goes "dormant." However the birth of new stars may balance out the destruction of old.
No... galaxies doesn't collapse unless there's
some external force or galaxy somehow gets additional mass.
Also center blackholes doesn't decide fate of galaxies, even these billion solar mass blackholes contain only small part of galaxy's total mass.
And neither does it cause increase of total gravity if matter/stars drop to that blackhole. There's still same total mass in there and only thing
affecting to gravity is amount of mass.
Considering future of our universe, currently it seems that we live in open, forever, expanding universe which means thermal death and that after
"some" billion years all fusionable matter in universe has been burned and all stars have died. Only light sources are once at a while happening
collisions of these dead bodies. After enough time even matter has disintegrated back to energy and all that is filling universe is radiation with
it's temperature cooling toward absolute zero.
Astronomy is science and in those everything has to be proved.
Astrology is like religion, you can say anything without need to proof anything and doesn't have anything to do with science.
For start here's some reading...
Curious About Astronomy
Views of the Solar System/Nine Planets