0
What else can I help you with?
What is the difference between cosmic background radiation and red shift?
Cosmic microwave background radiation is a specific radiation. Red shift is a change in frequency due to the fact that an object moves away from us (or for some other reason, such as a gravitational well); and that affects ALL types of radiations.
What is the diffeference between cosmic background radiation and red shift?
Cosmic background radiation is the residual radiation left over from the Big Bang, which fills the entire universe uniformly. Red shift, on the other hand, is the phenomenon where light from distant objects in space is stretched to longer (redder) wavelengths due to the expansion of the universe, indicating that these objects are moving away from us.
What evidence was used to develop the big bang theory?
The red shift and the cosmic microwave background radiation was the evidence used to develop the big bang theory.
How does cosmic microwave background radiation and red shift shown by distant galaxies support the big bang theory?
Red shift is the easiest to understand. Galaxies move away from us, therefore they move away from one another, therefore they must have been closer together in the past. (Redshift is usually interpreted to be the result of the cosmological Doppler effect.)As for the cosmic microwave background, both its relative homogeneity and the degree of minor inhomogeneities are basically in close agreement with the predictions of Big Bang + Inflation.
How can astronomers infer approximately how long the universe has been expanded?
Astronomers can determine the expansion of the universe by observing the cosmic background radiation, and the red- or blue-shifting of distant objects.
What are the best indications that the universe is expanding?
One of the best indications that the universe is expanding is the redshift of light from distant galaxies, which shows that they are moving away from us. Another indication is the cosmic microwave background radiation, which is consistent with an expanding universe. Additionally, observations of the distribution of galaxies and the large-scale structure of the universe support the idea of expansion.
How is the red shift different than the blue shift?
Radiation from a source moving away from the observer is red-shifted. Radiation from a source moving towards the observer is blue-shifted.
What evidence in 1956 that supports the big bang theory?
1) The existence, isotropy, and spectrum of the Cosmic Microwave Background Radiation. It was predicted sixteeen years before it was detected, and has been found to be exactly as proponents of Big Bang Cosmology (BBC) say it should be. All other hypotheses are reduced to saying, "I know the CMBR is there, I just have no explanation for it." 2) The red-shift of all distant galaxies, with the size of the red shift being proportional to the galaxies' distance from us. All observations of this red shift support a Universe that was far denser about 13.7 billion years ago. 3) The ratio of hydrogen and helium in our Universe is exactly as predicted by BBC. 4) Quasars are distant from us (ie, far in our past), but none are close. 5) The ratio of isotopes with long half-lives to their decay products show none of the former existed prior to about 12 billion years ago. 6) No white dwarf stars -- which will remain stable for tens of trillions of years -- have been found older than about ten billion years. The evidence for BBC is as strong as the evidence that our Earth goes around our Sun.
What else supports the big bang theory besides the red shift?
Other evidence supporting the Big Bang theory includes the cosmic microwave background radiation, the abundance of light elements in the universe, and the large-scale structure and distribution of galaxies in the universe. Additionally, observations of the universe's expansion and the Hubble law provide further support for the Big Bang theory.
What factors influence the big bang theory?
the red shift: planets are moving away from us therefore appear red. This implies that the universe is always expanding and so started from a very small and dense space ... The big bang was what triggered the change from small to ever expanding
How does red shift and cosmic radiation support the big bang theory?
Red shift shows that the distance between all points in our Universe has been increasing at a constant (approximately) rate. Thus, there must have been a time when the distance between points in our Universe was so small that all matter must have been (almost) infinitely dense. Based on our present calculation of the expansion rate, scientists have concluded that this time was 13.8 billion years ago. If Big Bang Cosmology is correct, then the existence, spectrum, and isotropy of the cosmic microwave background radiation are all very easy to explain. For all other hypotheses, even the existence of the cmbr is impossible to explain. Science requires that, when one hypothesis perfectly predicts an observation while another doesn't, you prefer the former.
The big bang theory of the formation and expansion of the universe is supported by the observed?
There are several astronomical observations which support the Big Bang theory. First of all, the universe is expanding. That can be measured by observation of the Doppler shift in radiation emitted by various stars, galaxies, quasars, etc. Furthermore, the more distant any given astronomical object is, the more rapidly it is receding from us. This is consistent with the expected result of the Big Bang. Secondly, we have observed what is known as the cosmic background microwave radiation. The sky is filled with radiation, no matter in what direction you look, and it corresponds to the radiation that would be emitted by an object at a temperature of about 4 Kelvins. This is also consistent with the expected residue of the Big Bang, 13.8 billion years later (the universe has cooled off a lot, in that time). It is also possible to assess the chemical constituents of the universe, the quantities of hydrogen, helium, and other elements, which can be observed by spectrographic analysis, and again, the results are consistent with the Big Bang theory. Everything fits.
