Cosmic microwave background radiation.
There are several aspects of the Big Bang Theory supported by observed phenomena:
The idea is that, since galaxies are moving away from each other now, then they used to be closer to each other. Extrapolating backwards in time, one can go back far enough to a time and place where all matter resided in a very small, dense region. called a singularity.
This state would have been all energy, as matter could not have existed as we know it in an energy field so intense. The "Big Bang" was the release of that energy, creating the current era of spacetime.
The energy dispersed and, as things cooled down, matter began to form. It's the expanding universe that is the evidence for the Big Bang.
Replacing The Steady State Theory
The Steady State Theory was an early, only partly scientific proposition put forth to explain how the universe around us created matter on a continual basis. Founded in large part on the ancient idea that our universe was a firmament, and only subject to margional changes, like those caused by us, the explosion of a star, or the effects of gravity as it pulls back the matter and energy from those stars and creates new objects, the Steady State Theory basically told us that the universe was always here and always would be...and also would remain the same size.
The later advancement of science in new areas such as quantum theory, relativity, and Edwin Hubble's discovery that the universe was actually expanding, all pointed in a direction different from that of the Steady State Theory. This led astronomers and cosmologists to begin pondering what the universe would have looked like before its expansion. At some point in the past the universe must have been much smaller, but how much smaller could it have been?
Quantum mechanics allows us to imagine and make practical predictions about how tiny the universe could have been in the past, which greatly helped the Big Bang Theory to catch on. It was suggested that the universe was at one point so tiny that it was the size of the tip of a needle, and was referred to as a singularity, much like the singularity of a black hole. But a black hole limitlessly pulls in everything around it, and there's no evidence of black holes exploding and creating new universes within our own. So the singularity idea faded away, though almost painfully slowly in some circles.
Journalists, and sometimes scientists, will erronously state that there was once nothing, and then the Big Bang created the universe. This isn't correct. There was never "nothing." You can look at this in two ways. 1) Energy can be created from matter, and matter can be created from energy. In fact, matter pushed to the speed of light literally becomes energy. Thus, even if the universe were crushed under all it's own gravity at the speed of light into energy 13.7 or so billion years ago at the place where the big bang occured, there was still energy. There was still something. Then there's option 2) Maybe God created the uinverse, but He would still have been here before us so there could never have been nothing.
With option 1, the universe began as energy packed so tight that even our theories of quantum mechanics cannot agree on what might have happened. It seems logical, at least on our common macroscopic level, that energy packed so tight would explode and begin expanding outward. And if we started from energy, that energy had to come from somewhere. Perhaps from some prior universe.
Evidence is not used to support theory.
Theory is used to explain evidence, and to predict where and how new evidence may be found.
When new evidence is found that theory can't explain, the prevailing theory is modified or discarded.
there is none. GOD made the universe
The scientific evidence supporting Big Bang Cosmology (BBC) is as solid as the evidence for our Sun being the center of our solar system. In both cases, if either idea were true, we on our Earth would observe certain things; if false, we would not observe them. Galileo became convinced of a helio-centric solar system when he observed phases in Venus. In a similar manner, the following observations are predicted by BBC, and ALL are seen:
1) all distant galaxies are red-shifted, and the size of the red-shift is proportional to the distance to them.
2) the existence, isotropy, and spectrum of cosmic microwave background radiation.
3) all parts of our Universe are about 90% hydrogen and 10% helium.
4) quasars are far away from us, but never close to us.
mia
the big bang occured
They would find what theory this evidence supports instead (according to AQA exam mark sheet)
the big bang theory
The most recent theory that upholds the Big Bang theory, but suggests a sudden expansion after the bang, is called the inflation theory. Earth is 4.54 billion years old.
Since the Big Bang
no the no. of stars in the milky way is not the evidence in support of the big bang cosmology.
The red shift and the cosmic microwave background radiation was the evidence used to develop the big bang theory.
The work provided even more additional evidence to support the Big Bang theory of the universe.It was also regarded as the starting point for cosmologyas a precision science.
Discard it all.
The observation that red shifts of distant galaxies gets greater the further away the galaxies are.
It is not so much that the universe is expanding, but rather the rationalization for its expansion that provides evidence to support the Big Bang Theory. The Big Bang supports interpreted observational evidence of the Cosmic Microwave Background Radiation (CMBR) barrier that there is an evolutionary expansion of the universe which promotes a finite age for the universe.
The red shift doesn't just indicate that there is evidence for the Big Bang theory: the Hubble red shift is evidence supporting the Big Bang theory.
It is not so much that the universe is expanding, but rather the rationalization for its expansion that provides evidence to support the Big Bang Theory. The Big Bang supports interpreted observational evidence of the Cosmic Microwave Background Radiation (CMBR) barrier that there is an evolutionary expansion of the universe which promotes a finite age for the universe.
The redshift of distant galaxies, which is normally attributed to the Doppler effect.=========================Comment #1:It's important to include in the answer the fact that the question speaks ofhow science is NOT done. Evidence is not used to support theory. Theoryis the attempt to explain existing evidence. THAT's how science works.
expansion of the universe as shown by the Hubble constant3K universal microwave background radiationetc.
the big bang occured
Hello i am minakshi and the answer is that the evidence collected by each tool is that the cosmic background microwave radiation sent by cosmic background explorer through radars it suggest that there was big bang in the past as big bang theory supports , the hubble space telescope which gives us information about the red shifs of galaxies and the doplers efect, and the analizationof the presence of light elements hydrogen and helium through spectroscope.