My point is if there is a black hole at the center of every galaxy or even half of them, wouldnt all the matter in the universe ultimately be doomed
to be absorbed by them over a long enough time period?
The black holes at the center of galaxies are not the normal boring black holes, but the supermassive variety. they suck in matter, yes, but in doing
so, they cause this matter to speed up and heat up, a lot. when this happens, matter is ejected from our side of the event horizon. this is a quasar.
when the matter/energy is ejected, it pushes other matter away from the black hole, depriving it of food. the very act of an SMBH feeding pushes its
own food supply away from the event horizon the black hole at the center of the galaxy is not urrently feeding, but it has stars orbiting it, very
fast.
In a singular non infinite universe could the big bang have been an ultimate black hole that had absorbed everything in the universe and exploded? If
that were true then could the big bang have been one of many in an infinite loop of matter being compacted and expanded over massive time periods?
maybe, but probably not, one of the four cosmological assumptions states that there can be no center, edge, or any specific point of the universe. a
black hole that sucked everything out and started everything would be a special point and theoretically can not exist.
Or is our universe one that simply started with a big bang and will end with every galaxy eventually being absorbed by its own black hole?
the expansion of the universe is increasing in speed, so, assuming a flat or open-shaped universe, the most likey possibility is that eventually,
because of the expansion, that all galaxies will be so isolated from each other and fading out into blackness. but this could happen if the universe
is a closed shape, but scientists havent seen evidence of any of these three possibilies of the shape of the universe.
But the leading theory i think is that the big bang was a collision of branes.
that is the the leading theory now, yes, and a new big bang could happen tomorrow, next year, a million years from now, never... we dont know
but what determines the size of a black hole? are they variable? we know black holes have immense gravity, correct? so, i would think they do "draw
in" matter. does this make them larger and therefore, increase their gravity ... and their draw?
Black holes are formed after a huge star goes supernova. the more massive the star, the bigger the black hole, the bigger the black hole, the bigger
gravity well. when a black hole feeds, it should get bigger.
IMHO the Solar Dynamics Observatory was recently sent into orbit to take measurements of the black hole at the centre of our sun. its infinitesimally
small, but starting to make an obvious impact on the sun(the suns outer magnetic field flipped in january, but we dont yet know whats going on in the
core(s) of the sun).
The sun's magnetic polarity flipping is really nothing special. it does it every 11 years. its part of the solar magnetic cycle. the solar magnetic
sphere is so effed up because the poles and equartor of the sun rotate at different rates and convection on the surface of the sun causes even more
tangling of the megnetic field. cos of this, we have sunspots, solar prominences, spicules, and the occasional coronal mass ejections. by the way,
where did you see that there's a black hole in the middle of the sun?
Where are all the white holes?
good question, but it's a very big universe with lots of mystery remaining to be discovered.
It also just occurred to me, that if black holes suck matter in, and are in essence gravity wells, then would white holes actually be radiating
gravity? That makes me think about a thing I read online awhile back, where this gal said something about a theory that our universe bleeds gravity to
a parallel universe.
i think white holes would spew matter and energy more than gravity, but the byproduct is mass and energy would be gravity... as for bleeding gravity,
it boils down to gravitons, one of the messanger particles for the 4 cosmic forces. it's the only one that hasn't been discovered. so scientists
speculate that gravitons bleed into different universes diluting the effect of gravity. you van see how weak the force of gravity in one simple
experiment: go over to a table and pick something up. you just beat the fore of gravity!
if you all think i'm nuts because im not providing links as evidence, i'm getting this info out of the notes i took in my astronomy class in
college. but noone is wrong, because frankly, noone's right with all we know, stuck here on our widdle planet. but i do appreciate the friendly
debate about the universe. this board lacks a lot of that
[edit on 5/3/2010 by Paladin327]
[edit on 5/3/2010 by Paladin327]
great discussion. 
