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.
Some questions about the Big Bang theory and its implications for the origin of the universe include: What caused the Big Bang? How did the universe evolve after the Big Bang? What evidence supports the Big Bang theory? What are the implications of the Big Bang for our understanding of the universe's beginning and future?
The three main pieces of evidence supporting the Big Bang theory are the cosmic microwave background radiation, the abundance of light elements in the universe, and the redshift of galaxies.
the universe underwent a Big Bang, as this radiation is the remnant heat left over from the early stages of the universe. This background radiation, known as the cosmic microwave background, supports the Big Bang theory as it provides a way to study the conditions in the early universe.
One major piece of evidence supporting the validity of the Big Bang theory is the cosmic microwave background radiation, which is a faint glow of radiation that fills the universe and is considered a remnant of the early stages of the universe's expansion.
the big bang theory
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.
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.
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.
No
yes it will happen again after the big crunch then of course, the big munch..... At present there is no evidence that another Big Bang will occur.