Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
All-sky map of CMB
After the Big Bang there was lots of high energy and short length gamma radiation required to create basic elements.The cosmic microwave background (CMB) is the left over radiation after the Big Bang. It is the oldest light in the universe to be captured and it has been captured and mapped. As seen on the left most of the radiation is evenly distributed. The slight differences in colour are areas with large Galaxies or stars. With most of the radiation evenly spread out this supports the Big Bang theory that the universe is expanding evenly in all directions.
Most matter in the universe was distributed evenly but areas that were slightly more dense gravitationally attracted matter nearby and became more dense. Eventually this grew to form gas clouds, stars, galaxies and more.
Out of all the protons and neutrons that existed in the beginning only 1 in 10 billion survived the the explosions caused by the collision of matter and anti-matter. Over time Protons combined with Neutrons and formed basic elements. After 379,000 years, electrons combined into the atoms. This stopped atoms from giving off radiation.
The temperature was so high that basic building blocks of atoms called quarks were starting to form. Quarks and its oppositely charged twin anti-Quark were continuously forming. The collision between anti-quarks and quarks in a densely packed area caused massive explosions which further caused the universe to expand. The quarks led to the formation of protons, neutrons, electrons and anti-protons, anti-neutrons and positrons.
The temperature cooled enough so that no more particles were created. There was a very small excess of quarks over anti-quarks. This resulted in most of the anti-matter being destroyed leaving the universe to consist of mostly matter which everything we know of is made of.
Steady State Theory [Internet]. Available: http://abyss.uoregon.edu/~js/glossary/steady_state.html. Accessed: 25/05/14
Steady State Theory [Internet]. Available: http://en.wikipedia.org/wiki/Steady_State_theory. Accessed: 25/05/14
Big Bang [Internet]. Available: http://en.wikipedia.org/wiki/Big_Bang. Accessed: 25/05/14
Big Bang Theory - An Overview [Internet]. Available: http://www.big-bang-theory.com/ Accessed: 25/05/14
Origins of the Universe [Internet]. Available: http://science.nationalgeographic.com.au/science/space/universe/origins-universe-article/ Accessed: 25/05/14
How the Big Bang Theory works [Internet]. Available: http://science.howstuffworks.com/dictionary/astronomy-terms/big-bang-theory1.htm Accessed: 26/05/14
Steady State Theory [Internet] Available: http://www.skwirk.com/p-c_s-4%20_u-138_t-402_c-1413/steady-state-theory/nsw/science/the-big-bang-and-our-universe/the-formation Accessed: 26/05/14
The Big Bang Theory [Internet]. Available: http://www.skwirk.com/p-c_s-4_u-138_t-402_c-1414/nsw/science/the-big-bang-and-our-universe/the-formation/the-big-bang-theory Accessed: 26/05/14
Olbers' Paradox [Internet]. Available: http://en.wikipedia.org/wiki/Olbers'_paradox Accessed: 26/05/14
The Cosmic Background Radiation [Internet]. Available: http://csep10.phys.utk.edu/astr162/lect/cosmology/cbr.html Accessed: 26/05/14
Errors in the Steady State Theory and Quasi-SS Models [Internet]. Available: http://www.astro.ucla.edu/~wright/stdystat.htm Accessed: 26/05/14
The bang was the origin of space and time. The theory does not provide any details about the initial condition of the universe but it is an attempt to describe the rapid expansion of it. Georges Lemaître, a Belgian priest, was the first to suggest the Big Bang theory in the 1920s. Edwin Hubble's observations of galaxies moving away from Earth and many other findings all support the theory.
The Big Bang theory is the most supported theory of the origin of the universe. Before the big bang, all matter and types of energy was compressed into a small dense and hot mass. This was followed by "The Big Bang" which expanded this small dense mass outwards in all directions to form the universe today.
In the 1920's Sir James Jeans was the first to propose the steady state theory. This was revised in 1948 by Fred Hoyle, Thomas Gold and Hermann Bondi.
The theory proposed that the universe is of an infinite scale but is constantly expanding with new matter being continuously created to keep the density of the universe constant. It also assumed that the universe was the same in all places and the same in all directions. At the time when this theory was first proposed it gained attention by many because this theory was considered more probable than the Big Bang theory which at that time did not have much evidence supporting it.
The Big Bang and the Steady State theory are both models of how the universe began. The Steady State theory is not well known and is disregarded by many people. Most observations made since 1950 has contradicted the Steady State theory and supported the Big Bang theory.
The main differences between the two theories is that
- The Big Bang theory states that the universe started from a single point and is constantly expanding
- The Steady State theory states that the universe had no start and it is always expanding.
This paradox describes that if the universe has an equal number of stars distributed around space as mentioned in the Steady State theory, then the night sky should be very bright and not dark. This further disproves the theory and it is no longer excepted by astronomers.
The discovery of quasars which, even the closest ones, are located very far away to earth disproves the Steady State theory which states that the universe looks the same from any point at the time. This is wrong because quasars formed very early in the life of the universe and they are only located far away from earth which shows that the universe was different in the past compared to how it is now and proves that it has been changing and it has not been in a constant state.
With the Big Bang theory slowly gaining support, the discovery of the Cosmic Microwave background radiation largely supported the big bang theory and the steady state theory lost its credibility.
By Matheesha Perera
http://outofthisworldsc663a.weebly.com/uploads/1/4/1/1/14117698/2508885_orig.jpg?375
Difference between Big Bang Theory and Steady State theory
-37
At aproximately 10 seconds after the big bang the the high energy density and temperatures caused the universe to expand exponentially and rapidly cool.
Edwin Hubble proved the existence of Hubble's Law and Hubble's constant after observing that the galaxies in the sky were redshifted meaning that they are moving further away from Earth. The Hubble's law is v = H d
where v is the velocity at which distant objects are moving relative to earth, D is the distance to the Object and H is Hubble's constant which is 70.4 km s Mpc
It is possible to run Hubble's law's rate of expansion backwards to find how long ago the age started to expand and it was found to be 13.8 billion years ago.
0
-1
0
www.d1jqu7g1y74ds1.cloudfront.net/wp-content/uploads/2011/12/history.bigbang.jpg