the big bang?

Question

What does the Big bang theory propose? and how has the temperature changed over time?

and like.. were stars and galaxies created during the big bang?please explain.

also what evidence do scienteist have that supports the big bang theory?

thanks so much! 10POINTS

Answer 1

I had a big bang once
I hit my head on a tree limb

Answer 2

I think it proposes that the universe was this tiny... thing... at one point and there was a big explosion that caused it to expand into what it is now and it's constantly getting bigger. Over time the temperature of the universe has decreased (I think) because the bang was so long ago. I think the stars and galaxies were created after the big bang because new stars and new galaxies are created all the time. I don't think there is any absolutely solid evidence that supports the big bang theory thats why its a theory and not a fact, but I think that the doppler effect shows that stars and galaxies are constantly moving further away from each other which makes u assume that they were much closer to each other at some point.

Answer 3

The big bang theory proposes that all that exists today comes from matter that was created in that event, it quickly appeared from the pure energy that was produced. The temperature was in the range of billions of degrees and rather quickly cooled after the main event. Stars and then galaxies appeared from clouds of hydrogen after a few billion years. All of this matter was created in the big bang and everything in the universe is made up of different combinations of three basic particles, the proton, the neutron and the electron. Billions of galaxies each containing billions of stars are believed to be racing away from each other, suggesting that it all started at one point a long time ago, that point was the big bang. It really is beautiful, don't you think?

Answer 4

The big bang theory states that 13.7 billion years ago, all that makes the universe was essentially occupying the same spot, and that all matter and energy expanded from that singularity point outwards. As the universe got bigger, the heat got "diluted, so the universe is now on average just a few degree above the absolute zero.

Stars and galaxies were not formed during the big bang. It took some time for the energy to first "condense" into matter (as the temperature reduced), then for it to form clouds of gas that could then clump up and collapse to form stars and galaxies.

The evidence we have is essentially observational: when we look at distance galaxies, we can see how fast they are moving relative to us. We can also determine how far they are. At the speed they travel, we can see that all galaxies would have started on top of one another, including our own, 13.7 billion years ago.
Then, using the theories behind them, the equations show that the average temperature of the universe should be around 3 K by now, if there was a big bang 13.7 billion years ago. And there is. So...

Answer 5

The Big Bang Theory says that all matter and all space in the Universe was originally contained in a single point (a singularity). When it initially exploded, the Universe was very hot, pure energy, in the gazillions of degrees. Hot beyond imaginable. However it cooled rapidly, and matter was able to form.

It took thousands of years before even atoms formed, so there were no stars and galaxies created in the Big Bang.

One of the most profound proofs of the Big Bang is called the Cosmic Background Radiation. The story of how this was discovered is fascinating. Back in the mid 1900's, it was generally accepted that the Big Bang Theory was true, and one of the things that postdocs did was calculate how hot the Universe would be if it were a certain number of years old. Ten billion, say, or 15 billion.

Penzias and Wilson were awarded the Nobel prize in 1978 for this discovery.

At Princeton University, there was a team of guys--Dicke, Peebles, and Wilkinson--who had calculated that the Universe should have a Cosmic Background Radiation of about 3K, or three degrees above absolute zero. They were in the process of building a microwave antenna to look for it. Peebles was writing a paper about it, and somehow an MIT Professor named Burke saw it.

Meanwhile, down the road at Bell Labs, two researchers named Arno Penzias and Robert Wilson were testing a very sensitive horn antenna. They kept hearing this background noise, no matter where they pointed the antenna. They spent about six months cleaning out pigeon poop and recalibrating and eliminating the possibility of radio sources in their frequency nearby. Penzias was probably bitching to Burke, and Burke mentioned this paper, and the rest was history.

Answer 6

It proposes that once the universe was very small and very hot. We know this because it's now expanding outwards and cooling.

No, stars didn't start forming until about a billion years after the big bang. First it had to cool enough for basic particles, like electrons and protons to form. Then they had to become atoms, like hydrogen. Then the large clouds of hydrogen had to collapse gravitationally to form stars. That took nearly a billion years. And these stars were incrediably massive and short-lived; not the kind of stars that life could have time to form around before they died in massive explosions. We had to wait for the second and third generation of smaller, cooler stars like the sun in order to expect life.

As for evidence, look up the expanding universe, the Hubble constant, and the microwave background (WMAP and COBE).

Answer 7

The Big Bang proposes the idea that the universe was created through a massive explosion

Yes, stars and galaxies developed at that time... of course they didn't just appear... they formed from the leftover gas and dust

Because of the Hubble DEEP SPACE mission, NASA scientists have been able to look far into our universe and see stars that survied billions and billions of years ago and may not beliving now.
This is possible because they are so far away... millions if not billions of lightyears away.. it's taken that much time for light to reach us.

Answer 8

Stars and Galaxies were NOT produced during the Big Bang. The fundamental particles we know today, protons, neutrons and electrons could not exist in the extreme heat. The electrical force was not enough to bind them due to the temperature. As space expanded and cooled, those particles began to form. It took millions of years after before stars could begin to form.

Evidence - Uniform background radiation that has been detected everywhere. Can be traced back to the Big Bang itself. For more detail visit NASAs site on the COBE satellite that detected this radiation -http://lambda.gsfc.nasa.gov/product/cobe/

Answer 9

The Big Bang will never get passed the theory stage until a Creator is accepted as the reason for the beginning of the universe which will never be accepted by scientists as to them there is no proof.But they believe in a theory which does not prove it either.Strange,isn't it?

Answer 10

the big bang theory was an scientific explanation in how the the earth and everthing in space was created. yes the stars and glaxies were created during the big bang. the theory has never known to fail.

Answer 11

The Big Bang Theory AKA The Big BS Theory. There could not be any evidence to that. How many billions of years ago was that supposed to take place???? And even if it did how do we know???? Have we been to the end of the space yet???? Do we know what is out there completely???? Give me one solid proof to believe it....!!!!