Vesto Slipher aided in the initial discovery of the big bang theory. In the year 1912 Mr Slipher came up with the measurement for the first Doppler shift of a spiral galaxies. During his research he discovered that majority of the galaxies were moving away from earth. Along with his discovery came doubt as there was controversy as to whether these galaxies actually existed or not outside the milky way. All of Slipher’s research can be divided into 3: rotations and radical velocities of spiral nebulae (galaxy), planetary atmospheres and rotations and diffuse nebulae and the interstellar medium. After all the research Slipher went on to calculate the direction and speed of spiral nebulae by the measurement in change in the wavelengths of light …show more content…
His discovery occurred in 1922 when he figured out the solution to the expanding universe that Einstein started. Friedman provided early and significant evidence supporting the expansion of the universe. It was said that at first Einstein came to the conclusion that Friedman’s results were incorrect, however, Einstein later agreed that they were indeed correct. After analysing Einstein’s results, Friedman began to assume that the universe was more or less made up of the same materials which were spread out equally. Upon carefully studying Einstein’s calculations, he later figured how to use Einstein’s calculations to show just how the universe would act under the theory of ‘general relativity.’ Even though Friedman got so far, he was still missing something to complete his research. He did not know the force of pressure or the density of matter throughout the universe. He is considered one of the most important developers in the Big Bang Theory. In the 1924 Hubble came to the conclusion that the faint lights that were seen were in fact lights from other galaxies. This discovery helped to change the way other astronomers and scientists thought. Hubble managed to get further proof of existing galaxies by taking pictures using Hooker’s telescope. In the mid 1920s he managed to commence new research on the other galaxies and their relationship to the milky way and earth. However, in 1929 Hubble’s greatest discovery was that of determining that the further a galaxy moves from earth, the quicker it seems to move. This further aided to information that was already there for The Big Bang Theory. This Belgian priest came up with a string of solutions for Einstein’s calculations, which was previously tried by Friedman in 1927. He later went on to propose that the inferred recession of the nebulae expansion of the universe. In 1931 Lemaitre went further on to conclude that the