In 1923, Hubble was interested in other things. Originally, he wanted to prove that some of the nebulae are actually other galaxies, much like our Milky Way. He used the largest and new telescope made by the astronomers in California to facilitate his research, trying to seek means to calculate the distances to the other galaxies. In 1929, he compared his findings to that of astronomer Vesto Slipher’ s redshift measurements and developed his Hubble diagram (Sloan Digital Sky Server 2010). Support for the Big Bang Theory What major evidences support the validity of the big bang theory?
First of all, there is the evident expansion of the universe. Considering the distance and velocity of each measurable galaxy, it shows that at about 14 billion years ago, everything must have been closer to each other. Hubble's law indicates that we are now in the middle of explosions of the galaxies. This theory states that the equation v = HD to always exist, wherein D corresponds to the proper distance, v corresponds to the recessional velocity, and v, H, and D varies based on the expansion of the Universe.
The abundance of light elements such as hydrogen and helium also account for this. The third major proof is the discovery of the CMB, with which Radioastronomers Arno Penzias and Robert Wilson shared the 1978 Nobel Prize for Physics. Furthermore, it is just reasonable to have a beginning of everything shows that in the Universe’ s first days, it was seen to be in full thermal equilibrium, and it emits and absorbs photons continuously which gave a blackbody spectrum (Hawking & Ellis, 1968).
The earth then cooled to a temperature wherein photons cannot anymore be created. Years after, there came the process of recombination where combined nuclei and electrons began to form atoms. Thus, radiation was created after the electrons have recombined. Such radiation is said to be seen, or observed in almost every part of the Universe. There are also fluctuations observed in the CMBR, owing to temperature variations (Kolb and Turner, 1990). As mentioned in the early parts of this text, this activity agrees harmoniously with the big bang nucleosynthesis.
The Big Bang since the big bang theory is the lone reason for the relative abundance of light elements, likewise, it is almost impossible to “ tune” the Big Bang to produce an average of 20-30% helium (Steigman, 2005).
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