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The ¨Father¨ of the Big Bang
In 1927, an astronomer named Georges Lemaître had a big idea. He said that a very long time ago, the universe started as just a single point. He said the universe stretched and expanded to get as big as it is now, and that it could keep on stretching. -
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Big Bang Theory
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Edwin Hubble
Two years later an astronomer named Edwin Hubble noticed that other galaxies were moving away from us. The farthest galaxies were moving faster than the ones close to us. At the time This meant that universe was still growing and expanding just like Lemaître thought which was reassuring for him. -
Hubble's Law
This was created by Edwin Hubble and it is the observation in physical cosmology that galaxies are moving away from the Earth at speeds proportional to their distance. This was the first observational basis for the Big Bang Theory and is still a very important piece of evidence that is used today. -
Redshift
A redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation such as light -
Vesto Slipher
He was the first to discover that distant galaxies are redshifted, which led to providing the first thought for the expansion of the universe. He was also the first to relate these redshifts to velocity. -
Particle Accelerator
This device allows physicists to recreate conditions just after the Big Bang by making a beam of fast-moving particles and bringing them together in very high-energy collisions.This technology has helped scientists study how it was like during the Big Bang and they can learn more about it. -
Hydrogen/ Helium
Ralph Alpher and George Gamow calculated that the early universe was hot and dense enough to make virtually all the helium, lithium and deuterium in the world. This means that all the Hydrogen and Helium came from the Big Bang. This is known as “Big Bang nucleosynthesis, -
George Gamow
He is known for the "big bang" theory of the origin of the universe. His theory is that after the big bang atomic nuclei were built up by the successive capture of neutrons by the initially formed pairs and triplets -
Nucleosynthesis
The Big Bang Nucleosynthesis theory predicts that roughly 25% the mass of the Universe consists of Helium. It also predicts about 0.01% deuterium and even smaller quantities of lithium.The theory, is that all the elements were produced either in stellar interiors or during supernova explosions. -
The Large Horn Antenna
Bell Labs built a 20-foot horn-shaped antenna in Holmdel NJ to be used with an early satellite system called Echo. The plan was to collect and amplify radio signals to send them across long distances but in a couple of years another satellite was launched and Echo became useless. Penzias and Wilson saw the chance to use it to analyze radio signals. As they started using it there was a static which would end up being Cosmic Microwave background. -
After Glow
Arno Penzias and Robert Wilson were both working for the Bell Telephone Laboratories in Murray Hill, New Jersey. They were building a radio receiver to look into the milky way. As they were working on it they were picking up higher-than-expected temperatures. They ended up finding cosmic fog that permeates the universe in every direction. -
CMB
The cosmic microwave background in Big Bang cosmology, is electromagnetic radiation. This is important because it fills all space. It is an important piece of data because it is the oldest electromagnetic radiation in the universe. -
Hubble Space Telescope
This telescope has been very helpful in discovering new things about the Big Bang and how it was created. It is still used today and is being upgraded so it can last longer and be used more to help find new things. -
Fred Hoyle
He advocated that the Universe had no beginning, and that new galaxies formed in the gaps as others moved apart. One of his outstanding contributions involved the discovery that the elements which make up ourselves were made from nuclear reactions inside distant stars. -
Big Bang Everywhere
When the Big Bang happened there was no edge or center to the universe so in a way it happened everywhere simultaneously.
