2007-07-18 07:19:12 · 7 answers · asked by JAMES 4 in Science & Mathematics ➔ Physics
Argh...I'm not clear why so many answers refer to before the BB when you clearly are asking about the BB, not before it.
Yes, it did have a higher temperature than the universe now has. In fact, from about 10^-50 seconds or so after the big bang our universe has been steadily cooling down. It started at a bit over 10^35 deg K when there was no matter, only energy.
Matter gelled out as the universe cooled and super protogalaxies formed. These eventually collapsed billions of years later under their own gravity pulls to collide and ultimately form the current set of galaxies, suns, and planets. The universal background temperature is now around 1 to 4 deg K, depending on the reference cited. [See source.]
The business about a center is also bogus. The BB had a center, a source if you will. But that source, its center, is probably not observable in our current known universe. Think of the total universe, known and unknown, as being a balloon. Blow the balloon up so it has a 14 to 15 inch radius. Now paint small white dots on the skin of that balloon. Those white dots are galaxies.
Now pick one white dot and call it the Milky Way...our galaxy. Draw a big circle about that white dot so it has a 14 to 15 inch radius on the skin. The dots inside that circle are the galaxies in our known universe and the radius of that circle represents 14 to 15 billion light years the size of our known universe. It's our known universe because that's how far light can travel in the 14 to 15 billion years since the BB. As time rolls by, we'll be able to see even more of the balloon's surface and our known universe will be even bigger.
Now, back to the center thing. Where is the center of the balloon, the whole universe. It's way far away from our known universe, which is on the skin of that balloon. In fact, we arbitrarily specified our galaxy, the Milky Way, as the center of our known universe simply because that puts its circular rim an equidistant 14 to 15 billion light years away. Therefore, the center of our known universe is just the one we selected for convenience, but that is not so clear for the whole universe, which is the entire balloon. But, living on the skin of the balloon, we are unable to see into that true center of the whole universe where the BB happened.
2007-07-18 08:15:28 · answer #1 · answered by oldprof 7 · 1⤊ 1⤋
There was no center to the Big Bang. The Big Bang was not a bang, it was just the early universe which was hotter than it is now. Then, like now, the universe was the same temperature throughout, and had no center.
2007-07-18 14:47:54 · answer #2 · answered by ZikZak 6 · 2⤊ 2⤋
The big bang would have initially been in perfect equilibrium and thus at the same temperature (although strictly speaking there is no "centre" to the big bang just as there is no "centre" to the universe). I should point out that the big bang theory is one of the most accurate and well-supported theories in science. No intelligent scientist doubts it's many predictions (CMB, nucleosynthesis, expanding universe) and there are mountains of data to support it.
2007-07-18 14:38:38 · answer #3 · answered by mistofolese 3 · 3⤊ 1⤋
Before the big bang (assuming that there was not another universe before it) There was nothing. No up, no down, no time and no temperature. Everything at that point in space/time was condensed into one infinitely small point.
The laws of physics as we know them would not apply.
2007-07-18 14:29:02 · answer #4 · answered by flibbitygibet 2 · 1⤊ 2⤋
Technically, there was no temperature before the big bang. If all matter was compressed into one object, that means light was also contained in this object. If light was not allowed to travel, then there could be no time, since we base time on the speed at which light travels. Therefore, if there is no time, there is no way to measure anything, so there was no temperature.
2007-07-18 14:26:31 · answer #5 · answered by yeeeehaw 5 · 1⤊ 4⤋
who says? who knows? Its total nonsense..
Before big-bang, nothing existed (as the theory explains). everything was compressed in singularity.
Before Big-Bang(as the theory says).. there was no time, No Temperature, No matter, No mass, No dimension, No nothing.
Singularity is defined as not-a-thing, and from nothing, our universe formed.
I don't believe in Big-Bang theory. There are lots more satisfying theories out there, more convincing than the Big-Bang.
2007-07-18 14:34:58 · answer #6 · answered by MDA 4 · 0⤊ 3⤋
the big bang is a bunch of balogna. my teacher tought me that matter cannot be created or destroyed and what is the big bang? matter being created!
2007-07-18 14:26:42 · answer #7 · answered by blah 2 · 0⤊ 6⤋